diff --git a/build.xml b/build.xml
index 68fcb8b4..e6e5860d 100644
--- a/build.xml
+++ b/build.xml
@@ -1150,21 +1150,25 @@
     	<CHANNEL.do channel="uk" verb="collect"/>
     </target>
     
-	<target name="flow.uk.pub.production">
-        <echo>UK production aggregate flow started.</echo>
-        <XALAN
-            x="${build.dir}/uk_master_unsigned.xsl"
-            i="${mdx.dir}/uk/collected.xml"
-            o="${temp.xml}"/>
-        <echo>      normalising namespaces...</echo>
-        <XALAN
-            x="${build.dir}/ns_norm_uk.xsl"
-            i="${temp.xml}"
-            o="${mdx.dir}/uk/${md.prod.unsigned}" />
+    <target name="flow.uk.generate">
+        <CHANNEL.do channel="uk" verb="generate"/>
+	</target>
+
+    <target name="generate.redux">
+        <CHANNEL.do channel="uk" verb="generate"/>
+
         <MDNORM i="${mdx.dir}/uk/${md.prod.unsigned}"/>
+        <MDNORM i="${mdx.dir}/uk/${md.wayf.unsigned}"/>
+        <MDNORM i="${mdx.dir}/uk/${md.back.unsigned}"/>
+        <MDNORM i="${mdx.dir}/uk/${md.test.unsigned}"/>
+        <MDNORM i="${mdx.dir}/uk/${md.export.unsigned}"/>
+
+        <echo>final checks...</echo>
         <CHECK.publishable i="${mdx.dir}/uk/${md.prod.unsigned}"/>
-        <echo>UK production aggregate flow completed.</echo>
-	</target>
+        <CHECK.publishable i="${mdx.dir}/uk/${md.wayf.unsigned}"/>
+        <CHECK.publishable i="${mdx.dir}/uk/${md.back.unsigned}"/>
+        <CHECK.publishable i="${mdx.dir}/uk/${md.test.unsigned}"/>
+    </target>
 
     <!--
         *******************************
diff --git a/mdx/common-beans.xml b/mdx/common-beans.xml
index c10caa31..1bae7682 100644
--- a/mdx/common-beans.xml
+++ b/mdx/common-beans.xml
@@ -28,29 +28,33 @@
     <!--
         commonNamespaces
         
-        A map that assigns the usual prefix for each of the commonly used XML namespaces.
+        A NamespaceContext that assigns the usual prefix for each of the commonly used XML namespaces.
         This is used in the evaluation of XPath expressions.
     -->
-    <util:map id="commonNamespaces" map-class="java.util.HashMap">
-        <entry key="alg"        value="urn:oasis:names:tc:SAML:metadata:algsupport"/>
-        <entry key="ds"         value="http://www.w3.org/2000/09/xmldsig#"/>
-        <entry key="elab"       value="http://eduserv.org.uk/labels"/>
-        <entry key="idpdisc"    value="urn:oasis:names:tc:SAML:profiles:SSO:idp-discovery-protocol"/>
-        <entry key="init"       value="urn:oasis:names:tc:SAML:profiles:SSO:request-init"/>
-        <entry key="md"         value="urn:oasis:names:tc:SAML:2.0:metadata"/>
-        <entry key="mdattr"     value="urn:oasis:names:tc:SAML:metadata:attribute"/>
-        <entry key="mdrpi"      value="urn:oasis:names:tc:SAML:metadata:rpi"/>
-        <entry key="mdui"       value="urn:oasis:names:tc:SAML:metadata:ui"/>
-        <entry key="saml"       value="urn:oasis:names:tc:SAML:2.0:assertion"/>
-        <entry key="samlp"      value="urn:oasis:names:tc:SAML:2.0:protocol"/>
-        <entry key="shibmd"     value="urn:mace:shibboleth:metadata:1.0"/>
-        <entry key="ukfedlabel" value="http://ukfederation.org.uk/2006/11/label"/>
-        <entry key="wayf"       value="http://sdss.ac.uk/2006/06/WAYF"/>
-        <entry key="xenc"       value="http://www.w3.org/2001/04/xmlenc#"/>
-        <entry key="xs"         value="http://www.w3.org/2001/XMLSchema"/>
-        <entry key="xsi"        value="http://www.w3.org/2001/XMLSchema-instance"/>
-        <entry key="xsl"        value="http://www.w3.org/1999/XSL/Transform"/>
-    </util:map>
+    <bean id="commonNamespaces" class="net.shibboleth.metadata.dom.SimpleNamespaceContext">
+        <constructor-arg>
+            <util:map map-class="java.util.HashMap">
+                <entry key="alg"        value="urn:oasis:names:tc:SAML:metadata:algsupport"/>
+                <entry key="ds"         value="http://www.w3.org/2000/09/xmldsig#"/>
+                <entry key="elab"       value="http://eduserv.org.uk/labels"/>
+                <entry key="idpdisc"    value="urn:oasis:names:tc:SAML:profiles:SSO:idp-discovery-protocol"/>
+                <entry key="init"       value="urn:oasis:names:tc:SAML:profiles:SSO:request-init"/>
+                <entry key="md"         value="urn:oasis:names:tc:SAML:2.0:metadata"/>
+                <entry key="mdattr"     value="urn:oasis:names:tc:SAML:metadata:attribute"/>
+                <entry key="mdrpi"      value="urn:oasis:names:tc:SAML:metadata:rpi"/>
+                <entry key="mdui"       value="urn:oasis:names:tc:SAML:metadata:ui"/>
+                <entry key="saml"       value="urn:oasis:names:tc:SAML:2.0:assertion"/>
+                <entry key="samlp"      value="urn:oasis:names:tc:SAML:2.0:protocol"/>
+                <entry key="shibmd"     value="urn:mace:shibboleth:metadata:1.0"/>
+                <entry key="ukfedlabel" value="http://ukfederation.org.uk/2006/11/label"/>
+                <entry key="wayf"       value="http://sdss.ac.uk/2006/06/WAYF"/>
+                <entry key="xenc"       value="http://www.w3.org/2001/04/xmlenc#"/>
+                <entry key="xs"         value="http://www.w3.org/2001/XMLSchema"/>
+                <entry key="xsi"        value="http://www.w3.org/2001/XMLSchema-instance"/>
+                <entry key="xsl"        value="http://www.w3.org/1999/XSL/Transform"/>
+            </util:map>
+        </constructor-arg>
+    </bean>
 
     <!--
         schemaResources
diff --git a/mdx/uk/beans.xml b/mdx/uk/beans.xml
index 4d9cf6b2..d06d3c67 100644
--- a/mdx/uk/beans.xml
+++ b/mdx/uk/beans.xml
@@ -45,7 +45,7 @@
         init-method="initialize" lazy-init="true">
         <property name="id" value="uk_filterDeletedEntities"/>
         <constructor-arg name="expression" value="//ukfedlabel:DeletedEntity"/>
-        <constructor-arg name="prefixMappings" ref="commonNamespaces"/>
+        <constructor-arg name="context" ref="commonNamespaces"/>
     </bean>
     
     
@@ -188,6 +188,22 @@
     </bean>
     
     
+    <!--
+        uk_performFixups
+        
+        This stage performs any fixup actions required before publication to UK federation members.
+    -->
+    <bean id="uk_performFixups" class="net.shibboleth.metadata.dom.XSLTransformationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_performFixups"/>
+        <property name="xslResource">
+            <bean class="org.opensaml.util.resource.FilesystemResource">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/fixups.xsl"/>
+            </bean>
+        </property>
+    </bean>
+    
+    
     <!--
         Populate UKId values from entities.
     -->
@@ -234,4 +250,23 @@
         </property>
     </bean>
     
+
+    <!--
+        uk_normaliseNamespaces
+        
+        A pipeline stage that can be used before serialisation to normalise the namespaces
+        used in an XML document.  This one is UK-specific, as it makes specific choices
+        in order to limit the number of prefixes used.
+    -->
+    <bean id="uk_normaliseNamespaces" class="net.shibboleth.metadata.dom.XSLTransformationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_normaliseNamespaces"/>
+        <property name="xslResource">
+            <bean class="org.opensaml.util.resource.FilesystemResource">
+                <constructor-arg value="#{ systemProperties['basedir'] }/build/ns_norm_uk.xsl"/>
+            </bean>
+        </property>
+    </bean>
+    
+
 </beans>
diff --git a/mdx/uk/final_tweak.xsl b/mdx/uk/final_tweak.xsl
new file mode 100644
index 00000000..ed535c30
--- /dev/null
+++ b/mdx/uk/final_tweak.xsl
@@ -0,0 +1,122 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+	final_tweak.xsl
+
+	Final tweaks required for UK federation aggregates.
+	
+-->
+<xsl:stylesheet version="1.0"
+	xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata"
+	xmlns:shibmd="urn:mace:shibboleth:metadata:1.0"
+	xmlns:ukfedlabel="http://ukfederation.org.uk/2006/11/label"
+	xmlns:wayf="http://sdss.ac.uk/2006/06/WAYF"
+	
+	xmlns:date="http://exslt.org/dates-and-times"
+	xmlns:mdxDates="xalan://uk.ac.sdss.xalan.md.Dates"
+	extension-element-prefixes="date mdxDates"
+	
+	xmlns="urn:oasis:names:tc:SAML:2.0:metadata"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+	exclude-result-prefixes="md">
+
+	<!--Force UTF-8 encoding for the output.-->
+	<xsl:output omit-xml-declaration="no" method="xml" encoding="UTF-8" indent="yes"/>
+
+	<!--
+		extraText
+		
+		This parameter, if present, provides additional text to be put in the
+		document comment.
+	-->
+	<xsl:param name="extraText"/>
+	
+	<!--
+		validityDays
+		
+		This parameter determines the number of days between the aggregation instant and the
+		end of validity of the signed metadata.
+	-->
+	<xsl:param name="validityDays" select="14"/>
+	
+	<xsl:variable name="now" select="date:date-time()"/>
+	<xsl:variable name="validUntil" select="mdxDates:dateAdd($now, $validityDays)"/>
+	
+	<!--
+		documentID
+		
+		This value is generated from a normalised version of the aggregation instant,
+		transformed so that it can be used as an XML ID value.
+		
+		Strict conformance to the SAML 2.0 metadata specification (section 3.1.2) requires
+		that the signature explicitly references an identifier attribute in the element
+		being signed, in this case the document element.
+	-->
+	<xsl:variable name="normalisedNow" select="mdxDates:dateAdd($now, 0)"/>
+	<xsl:variable name="documentID"
+		select="concat('uk', translate($normalisedNow, ':-', ''))"/>
+
+	<!--
+		Document root.
+	-->
+	<xsl:template match="/">
+		<xsl:call-template name="document.comment"/>
+		<xsl:apply-templates/>
+	</xsl:template>
+	
+	<!--
+		Document element.
+	-->
+	<xsl:template match="/md:EntitiesDescriptor">
+		<EntitiesDescriptor>
+			<xsl:attribute name="validUntil">
+				<xsl:value-of select="$validUntil"/>
+			</xsl:attribute>
+			<xsl:attribute name="ID">
+				<xsl:value-of select="$documentID"/>
+			</xsl:attribute>
+			<xsl:apply-templates select="@*"/>
+			<xsl:call-template name="document.comment"/>
+			<xsl:apply-templates select="node()"/>
+		</EntitiesDescriptor>
+	</xsl:template>
+
+	<!--
+		Comment to be added to the top of the document, and just inside the document element.
+	-->
+	<xsl:template name="document.comment">
+		<xsl:comment>
+			<xsl:text>&#10;&#9;U K   F E D E R A T I O N   M E T A D A T A&#10;</xsl:text>
+			<xsl:text>&#10;</xsl:text>
+			<xsl:if test="$extraText">
+				<xsl:text>&#9;*** </xsl:text>
+				<xsl:value-of select="$extraText"/>
+				<xsl:text> ***&#10;</xsl:text>
+				<xsl:text>&#10;</xsl:text>
+			</xsl:if>
+			<xsl:text>&#9;Aggregate built </xsl:text>
+			<xsl:value-of select="$now"/>
+			<xsl:text>&#10;</xsl:text>
+			<xsl:text>&#10;</xsl:text>
+			<xsl:text>&#9;Aggregate valid for </xsl:text>
+			<xsl:value-of select="$validityDays"/>
+			<xsl:text> days, until </xsl:text>
+			<xsl:value-of select="$validUntil"/>
+			<xsl:text>&#10;</xsl:text>
+		</xsl:comment>
+	</xsl:template>
+	
+	<!--By default, copy text blocks, comments and attributes unchanged.-->
+	<xsl:template match="text()|comment()|@*">
+		<xsl:copy/>
+	</xsl:template>
+	
+	<!--By default, copy all elements from the input to the output, along with their attributes and contents.-->
+	<xsl:template match="*">
+		<xsl:copy>
+			<xsl:apply-templates select="node()|@*"/>
+		</xsl:copy>
+	</xsl:template>
+	
+</xsl:stylesheet>
diff --git a/mdx/uk/fixups.xsl b/mdx/uk/fixups.xsl
new file mode 100644
index 00000000..403d9a3e
--- /dev/null
+++ b/mdx/uk/fixups.xsl
@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+	fixups.xsl
+	
+	XSL stylesheet to perform any fixups required to an EntityDescriptor prior to
+	publication to the UK federation membership.
+	
+-->
+<xsl:stylesheet version="1.0"
+	xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
+	xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata"
+	xmlns:ukfedlabel="http://ukfederation.org.uk/2006/11/label"
+	
+	xmlns="urn:oasis:names:tc:SAML:2.0:metadata"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+	exclude-result-prefixes="xsi xsl">
+
+	<!--Force UTF-8 encoding for the output.-->
+	<xsl:output omit-xml-declaration="no" method="xml" encoding="UTF-8" indent="yes"/>
+
+	
+	<!--
+		Patch any @use-less KeyName descriptors in IdP roles
+		for the benefit of Shib SPs pre-1.3.1.
+	-->
+	<xsl:template match="md:IDPSSODescriptor/md:KeyDescriptor[not(@use)] |
+		md:AttributeAuthorityDescriptor/md:KeyDescriptor[not(@use)]">
+		<xsl:copy>
+			<xsl:attribute name="use">signing</xsl:attribute>
+			<xsl:apply-templates/>
+		</xsl:copy>
+	</xsl:template>
+	
+	
+	<!--
+		Remove any EncryptionMethod elements within KeyDescriptor elements
+		to avoid triggering a problem in OpenSAML-C 2.0.
+		
+		See https://wiki.shibboleth.net/confluence/display/SHIB2/MetadataCorrectness#MetadataCorrectness-Version2.0
+	-->
+	<xsl:template match="md:KeyDescriptor/md:EncryptionMethod"/>
+	
+		
+	<!--
+        *********************************************
+        ***                                       ***
+        ***   D E F A U L T   T E M P L A T E S   ***
+        ***                                       ***
+        *********************************************
+    -->
+    
+
+	<!--By default, copy text blocks, comments and attributes unchanged.-->
+	<xsl:template match="text()|comment()|@*">
+		<xsl:copy/>
+	</xsl:template>
+	
+	<!--By default, copy all elements from the input to the output, along with their attributes and contents.-->
+	<xsl:template match="*">
+		<xsl:copy>
+			<xsl:apply-templates select="node()|@*"/>
+		</xsl:copy>
+	</xsl:template>
+	
+</xsl:stylesheet>
diff --git a/mdx/uk/fragment.xsl b/mdx/uk/fragment.xsl
index b0c281f1..07370eb9 100644
--- a/mdx/uk/fragment.xsl
+++ b/mdx/uk/fragment.xsl
@@ -10,7 +10,8 @@
 <xsl:stylesheet version="1.0"
 	xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
 	xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata"
-
+	xmlns:ukfedlabel="http://ukfederation.org.uk/2006/11/label"
+	
 	xmlns="urn:oasis:names:tc:SAML:2.0:metadata"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
@@ -26,6 +27,12 @@
 	<xsl:template match="@xsi:schemaLocation"/>
 
 
+	<!--
+		Remove administrative contacts.
+	-->
+	<xsl:template match="md:ContactPerson[@contactType='administrative']"/>
+	
+
 	<!--
 		Discard various ds:X509 elements.  Several of these are known to
 		cause problems with software systems, and they don't affect trust
@@ -35,6 +42,19 @@
 	<xsl:template match="ds:X509IssuerSerial"/><!-- must remove this if we remove SerialNumber -->
 	
 
+	<!--
+		Retain only certain comments.
+	-->
+	
+	<xsl:template match="md:EntityDescriptor/comment()">
+		<xsl:copy/>
+	</xsl:template>
+	
+	<!--
+		All other comments are stripped by the default templates.
+	-->
+
+
 	<!--
         *********************************************
         ***                                       ***
@@ -43,9 +63,9 @@
         *********************************************
     -->
     
-    
-	<!--By default, copy text blocks, comments and attributes unchanged.-->
-	<xsl:template match="text()|comment()|@*">
+
+	<!--By default, copy text blocks and attributes unchanged.-->
+	<xsl:template match="text()|@*">
 		<xsl:copy/>
 	</xsl:template>
 	
diff --git a/mdx/uk/generate.xml b/mdx/uk/generate.xml
new file mode 100644
index 00000000..54510995
--- /dev/null
+++ b/mdx/uk/generate.xml
@@ -0,0 +1,366 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    Verb to generate all UK aggregates.
+-->
+<beans xmlns="http://www.springframework.org/schema/beans"
+    xmlns:util="http://www.springframework.org/schema/util"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="
+        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
+        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">
+
+    <!--
+        Import commonly used beans.
+    -->
+    <import resource="../common-beans.xml"/>
+    
+    <!--
+        Import channel-specific beans.
+    -->
+    <import resource="beans.xml"/>
+
+    <bean id="everythingSelector" class="net.shibboleth.metadata.AlwaysItemSelectionStrategy"/>
+    
+    <bean id="uk_stripExtensions" class="net.shibboleth.metadata.dom.XSLTransformationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_stripExtensions"/>
+        <property name="xslResource">
+            <bean class="org.opensaml.util.resource.FilesystemResource">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/strip_extensions.xsl"/>
+            </bean>
+        </property>
+    </bean>
+    
+    <!--
+        ***************************************************
+        ***                                             ***
+        ***   P R O D U C T I O N   A G G R E G A T E   ***
+        ***                                             ***
+        ***************************************************
+    -->
+    
+    <bean id="uk_finaliseProduction" class="net.shibboleth.metadata.dom.XSLTransformationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_finaliseProduction"/>
+        <property name="xslResource">
+            <bean class="org.opensaml.util.resource.FilesystemResource">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/final_tweak.xsl"/>
+            </bean>
+        </property>
+    </bean>
+
+    <bean id="serializeUnsignedProductionAggregate" class="net.shibboleth.metadata.pipeline.SerializationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="serializeUnsignedProductionAggregate"/>
+        <property name="serializer" ref="serializer"/>
+        <property name="outputFile">
+            <bean class="java.io.File">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/ukfederation-metadata-unsigned.xml"/>
+            </bean>
+        </property>
+    </bean>
+
+    <bean id="uk_productionPipeline" class="net.shibboleth.metadata.pipeline.SimplePipeline"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_productionPipeline"/>
+        <property name="stages">
+            <list>
+                <ref bean="uk_assemble"/>
+                <ref bean="uk_addTrustRoots"/>
+                <ref bean="uk_finaliseProduction"/>
+                <ref bean="uk_normaliseNamespaces"/>
+                
+                <!-- production aggregate MUST pass publishability test -->
+                <ref bean="CHECK_publishable"/>
+                <ref bean="errorTerminatingFilter"/>
+                
+                <ref bean="serializeUnsignedProductionAggregate"/>
+            </list>
+        </property>
+    </bean>
+    
+    <!--
+        ***************************************
+        ***                                 ***
+        ***   W A Y F   A G G R E G A T E   ***
+        ***                                 ***
+        ***************************************
+    -->
+    
+    <bean id="uk_wayfSelector" class="net.shibboleth.metadata.dom.XPathItemSelectionStrategy"
+        lazy-init="true">
+        <constructor-arg value="/md:EntityDescriptor[not(md:Extensions/wayf:HideFromWAYF)]"/>
+        <constructor-arg ref="commonNamespaces"/>
+    </bean>
+    
+    <bean id="serializeUnsignedWayfAggregate" class="net.shibboleth.metadata.pipeline.SerializationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="serializeUnsignedWayfAggregate"/>
+        <property name="serializer" ref="serializer"/>
+        <property name="outputFile">
+            <bean class="java.io.File">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/ukfederation-wayf-unsigned.xml"/>
+            </bean>
+        </property>
+    </bean>
+    
+    <bean id="uk_wayfPipeline" class="net.shibboleth.metadata.pipeline.SimplePipeline"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_wayfPipeline"/>
+        <property name="stages">
+            <list>
+                <ref bean="uk_assemble"/>
+                <ref bean="uk_finaliseProduction"/>
+                <ref bean="uk_normaliseNamespaces"/>
+
+                <!-- WAYF aggregate MUST pass publishability test -->
+                <ref bean="CHECK_publishable"/>
+                <ref bean="errorTerminatingFilter"/>
+
+                <ref bean="serializeUnsignedWayfAggregate"/>
+            </list>
+        </property>
+    </bean>
+    
+    <!--
+        ***********************************************
+        ***                                         ***
+        ***   F A L L B A C K   A G G R E G A T E   ***
+        ***                                         ***
+        ***********************************************
+    -->
+    
+    <bean id="uk_finaliseFallback" class="net.shibboleth.metadata.dom.XSLTransformationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_finaliseFallback"/>
+        <property name="xslResource">
+            <bean class="org.opensaml.util.resource.FilesystemResource">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/final_tweak.xsl"/>
+            </bean>
+        </property>
+        <property name="transformParameters">
+            <map>
+                <entry key="extraText" value="Feature fallback metadata; not for production use"/>
+            </map>
+        </property>
+    </bean>
+    
+    <bean id="serializeUnsignedFallbackAggregate" class="net.shibboleth.metadata.pipeline.SerializationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="serializeUnsignedFallbackAggregate"/>
+        <property name="serializer" ref="serializer"/>
+        <property name="outputFile">
+            <bean class="java.io.File">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/ukfederation-back-unsigned.xml"/>
+            </bean>
+        </property>
+    </bean>
+    
+    <bean id="uk_fallbackPipeline" class="net.shibboleth.metadata.pipeline.SimplePipeline"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_fallbackPipeline"/>
+        <property name="stages">
+            <list>
+                <ref bean="uk_assemble"/>
+                <ref bean="uk_addTrustRoots"/>
+                <ref bean="uk_finaliseFallback"/>
+                <ref bean="uk_normaliseNamespaces"/>
+                
+                <!-- fallback aggregate MUST pass publishability test -->
+                <ref bean="CHECK_publishable"/>
+                <ref bean="errorTerminatingFilter"/>
+                
+                <ref bean="serializeUnsignedFallbackAggregate"/>
+            </list>
+        </property>
+    </bean>
+    
+    <!--
+        ***************************************
+        ***                                 ***
+        ***   T E S T   A G G R E G A T E   ***
+        ***                                 ***
+        ***************************************
+    -->
+    
+    <bean id="uk_finaliseTest" class="net.shibboleth.metadata.dom.XSLTransformationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_finaliseTest"/>
+        <property name="xslResource">
+            <bean class="org.opensaml.util.resource.FilesystemResource">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/final_tweak.xsl"/>
+            </bean>
+        </property>
+        <property name="transformParameters">
+            <map>
+                <entry key="extraText" value="Feature test metadata; not for production use"/>
+            </map>
+        </property>
+    </bean>
+    
+    <bean id="serializeUnsignedTestAggregate" class="net.shibboleth.metadata.pipeline.SerializationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="serializeUnsignedTestAggregate"/>
+        <property name="serializer" ref="serializer"/>
+        <property name="outputFile">
+            <bean class="java.io.File">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/ukfederation-test-unsigned.xml"/>
+            </bean>
+        </property>
+    </bean>
+    
+    <!--
+        *******************************************
+        ***                                     ***
+        ***   E X P O R T   A G G R E G A T E   ***
+        ***                                     ***
+        *******************************************
+    -->
+    
+    <bean id="uk_finaliseExport" class="net.shibboleth.metadata.dom.XSLTransformationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_finaliseExport"/>
+        <property name="xslResource">
+            <bean class="org.opensaml.util.resource.FilesystemResource">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/final_tweak.xsl"/>
+            </bean>
+        </property>
+        <property name="transformParameters">
+            <map>
+                <entry key="extraText" value="Prototype export metadata; not for production use"/>
+            </map>
+        </property>
+    </bean>
+    
+    <bean id="uk_exportSelector" class="net.shibboleth.metadata.dom.XPathItemSelectionStrategy"
+        lazy-init="true">
+        <constructor-arg value="/md:EntityDescriptor[md:Extensions/ukfedlabel:ExportOptIn]"/>
+        <constructor-arg ref="commonNamespaces"/>
+    </bean>
+    
+    <bean id="serializeUnsignedExportAggregate" class="net.shibboleth.metadata.pipeline.SerializationStage"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="serializeUnsignedExportAggregate"/>
+        <property name="serializer" ref="serializer"/>
+        <property name="outputFile">
+            <bean class="java.io.File">
+                <constructor-arg value="#{ systemProperties['basedir'] }/mdx/uk/ukfederation-export-unsigned.xml"/>
+            </bean>
+        </property>
+    </bean>
+    
+    <bean id="uk_exportPipeline" class="net.shibboleth.metadata.pipeline.SimplePipeline"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="uk_exportPipeline"/>
+        <property name="stages">
+            <list>
+                <ref bean="uk_stripExtensions"/>
+                <ref bean="uk_assemble"/>
+                <ref bean="uk_finaliseExport"/>
+                <ref bean="uk_normaliseNamespaces"/>
+                <ref bean="serializeUnsignedExportAggregate"/>
+            </list>
+        </property>
+    </bean>
+    
+    <!--
+        *************************************
+        ***                               ***
+        ***   M A I N   P I P E L I N E   ***
+        ***                               ***
+        *************************************
+    -->
+    
+    <bean id="generate" class="net.shibboleth.metadata.pipeline.SimplePipeline"
+        init-method="initialize" lazy-init="true">
+        <property name="id" value="generate"/>
+        <property name="stages">
+            <list>
+                <!--
+                    Acquire metadata for all UK-registered entities.
+                -->
+                <ref bean="uk_registeredEntities"/>
+                
+                <!--
+                    Fork into a new pipeline for the export aggregate.
+                    
+                    The export aggregate only includes UK-registered entities,
+                    so the fork needs to occur before any others are introduced.
+                    
+                    The export aggregate is also intended to reflect the registered
+                    metadata as closely as possible, so the fork must happen before
+                    too many UK-specific transformations are performed.
+                -->
+                <bean id="exportDemux" class="net.shibboleth.metadata.pipeline.PipelineDemultiplexerStage"
+                    init-method="initialize" lazy-init="true">
+                    <property name="id" value="exportDemux"/>
+                    <property name="pipelineAndSelectionStrategies">
+                        <list>
+                            <bean class="org.opensaml.util.Pair">
+                                <constructor-arg ref="uk_exportPipeline"/>
+                                <constructor-arg ref="uk_exportSelector"/>
+                            </bean>
+                        </list>
+                    </property>
+                    <property name="waitingForPipelines" value="true"/>
+                </bean>
+                
+                <!--
+                    Strip out those ukfedlabel extensions that we don't publish.
+                    
+                    This is performed independently on the export pipeline because
+                    selection for that pipeline is based on these same extensions.
+                -->
+                <ref bean="uk_stripExtensions"/>
+                
+                <!--
+                    Perform fixups on UK federation entities.  We need to make sure
+                    this is also performed on all inbound metadata too, but that is
+                    done elsewhere.
+                -->
+                <ref bean="uk_performFixups"/>
+                
+                <!--
+                    Fork into new pipelines for the production, fallback and WAYF aggregates.
+                -->
+                <bean id="wayfDemux" class="net.shibboleth.metadata.pipeline.PipelineDemultiplexerStage"
+                    init-method="initialize" lazy-init="true">
+                    <property name="id" value="wayfDemux"/>
+                    <property name="pipelineAndSelectionStrategies">
+                        <list>
+                            <bean class="org.opensaml.util.Pair">
+                                <constructor-arg ref="uk_productionPipeline"/>
+                                <constructor-arg ref="everythingSelector"/>
+                            </bean>
+                            <bean class="org.opensaml.util.Pair">
+                                <constructor-arg ref="uk_fallbackPipeline"/>
+                                <constructor-arg ref="everythingSelector"/>
+                            </bean>
+                            <bean class="org.opensaml.util.Pair">
+                                <constructor-arg ref="uk_wayfPipeline"/>
+                                <constructor-arg ref="uk_wayfSelector"/>
+                            </bean>
+                        </list>
+                    </property>
+                    <property name="waitingForPipelines" value="true"/>
+                </bean>
+                
+                <!-- merge in entities from other metadata sources -->
+                
+                <!-- pipeline continues to generate test aggregate -->
+                <ref bean="uk_assemble"/>
+                <ref bean="uk_addTrustRoots"/>
+                <ref bean="uk_finaliseTest"/>
+                <ref bean="uk_normaliseNamespaces"/>
+                
+                <!-- test aggregate MUST pass publishability test -->
+                <ref bean="CHECK_publishable"/>
+                <ref bean="errorTerminatingFilter"/>
+                
+                <ref bean="serializeUnsignedTestAggregate"/>
+
+            </list>
+        </property>
+    </bean>
+
+</beans>
diff --git a/mdx/uk/strip_extensions.xsl b/mdx/uk/strip_extensions.xsl
new file mode 100644
index 00000000..dc835832
--- /dev/null
+++ b/mdx/uk/strip_extensions.xsl
@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+	strip_extensions.xsl
+	
+	Strip out any ukfedlabel namespace extensions that we don't intend to publish.
+	This may require removing now-empty md:Extensions elements.
+-->
+<xsl:stylesheet version="1.0"
+	xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata"
+	xmlns:ukfedlabel="http://ukfederation.org.uk/2006/11/label"
+	
+	xmlns:exsl="http://exslt.org/common"
+	extension-element-prefixes="exsl"
+	
+	xmlns="urn:oasis:names:tc:SAML:2.0:metadata"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+	exclude-result-prefixes="md">
+
+	<!--
+		Handle <md:Extensions> elements.
+		
+		In general, at this stage in the flow we pass through any Extensions unaltered.
+		However, certain changes (such as the filtering we perform on extensions in the
+		ukfedlabel namespace) may cause the Extensions element to become empty, which is not
+		permitted by the schema.  We therefore precompute the resulting Extensions element
+		and suppress it entirely if it would have no child elements.
+	-->
+	<xsl:template match="md:Extensions">
+		<!-- compute result -->
+		<xsl:variable name="ext">
+			<xsl:copy>
+				<xsl:apply-templates select="node()|@*"/>
+			</xsl:copy>
+		</xsl:variable>
+		<!-- copy through only if schema-valid -->
+		<xsl:if test="count(exsl:node-set($ext)/md:Extensions/*) != 0">
+			<xsl:copy-of select="$ext"/>
+		</xsl:if>
+	</xsl:template>
+	
+	<!--
+		Pass through certain ukfedlabel namespace elements.
+	-->
+	<xsl:template match="ukfedlabel:UKFederationMember | ukfedlabel:AccountableUsers">
+		<xsl:copy>
+			<xsl:apply-templates select="node()|@*"/>
+		</xsl:copy>
+	</xsl:template>
+	
+	<!--
+		Strip all other ukfedlabel namespace elements entirely.
+	-->
+	<xsl:template match="ukfedlabel:*"/>
+
+
+	<!--By default, copy text blocks, comments and attributes unchanged.-->
+	<xsl:template match="text()|comment()|@*">
+		<xsl:copy/>
+	</xsl:template>
+	
+	<!--By default, copy all elements from the input to the output, along with their attributes and contents.-->
+	<xsl:template match="*">
+		<xsl:copy>
+			<xsl:apply-templates select="node()|@*"/>
+		</xsl:copy>
+	</xsl:template>
+	
+</xsl:stylesheet>