diff --git a/poky/documentation/overview-manual/overview-manual-concepts.xml b/poky/documentation/overview-manual/overview-manual-concepts.xml
index f085dd7..58b64bd 100644
--- a/poky/documentation/overview-manual/overview-manual-concepts.xml
+++ b/poky/documentation/overview-manual/overview-manual-concepts.xml
@@ -1,6 +1,7 @@
 <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
 [<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
 
 <chapter id=' overview-manual-concepts'>
 <title>Yocto Project Concepts</title>
diff --git a/poky/documentation/overview-manual/overview-manual-customization.xsl b/poky/documentation/overview-manual/overview-manual-customization.xsl
index 22360e7..1dd91bd 100644
--- a/poky/documentation/overview-manual/overview-manual-customization.xsl
+++ b/poky/documentation/overview-manual/overview-manual-customization.xsl
@@ -1,4 +1,6 @@
 <?xml version='1.0'?>
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
+
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.w3.org/1999/xhtml" xmlns:fo="http://www.w3.org/1999/XSL/Format" version="1.0">
 
   <xsl:import href="http://downloads.yoctoproject.org/mirror/docbook-mirror/docbook-xsl-1.76.1/xhtml/docbook.xsl" />
diff --git a/poky/documentation/overview-manual/overview-manual-development-environment.xml b/poky/documentation/overview-manual/overview-manual-development-environment.xml
index 36ebf8a..8415d1d 100644
--- a/poky/documentation/overview-manual/overview-manual-development-environment.xml
+++ b/poky/documentation/overview-manual/overview-manual-development-environment.xml
@@ -1,6 +1,7 @@
 <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
 [<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
 
 <chapter id='overview-development-environment'>
 <title>The Yocto Project Development Environment</title>
diff --git a/poky/documentation/overview-manual/overview-manual-intro.xml b/poky/documentation/overview-manual/overview-manual-intro.xml
index 39433aa..0e0bfed 100644
--- a/poky/documentation/overview-manual/overview-manual-intro.xml
+++ b/poky/documentation/overview-manual/overview-manual-intro.xml
@@ -1,6 +1,7 @@
 <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
 [<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
 
 <chapter id='overview-manual-intro'>
 
diff --git a/poky/documentation/overview-manual/overview-manual-style.css b/poky/documentation/overview-manual/overview-manual-style.css
index 97a364b..eec9341 100644
--- a/poky/documentation/overview-manual/overview-manual-style.css
+++ b/poky/documentation/overview-manual/overview-manual-style.css
@@ -1,4 +1,6 @@
 /*
+   SPDX-License-Identifier: CC-BY-2.0-UK
+
    Generic XHTML / DocBook XHTML CSS Stylesheet.
 
    Browser wrangling and typographic design by
diff --git a/poky/documentation/overview-manual/overview-manual-yp-intro.xml b/poky/documentation/overview-manual/overview-manual-yp-intro.xml
index 1b60a30..2097ed3 100644
--- a/poky/documentation/overview-manual/overview-manual-yp-intro.xml
+++ b/poky/documentation/overview-manual/overview-manual-yp-intro.xml
@@ -1,6 +1,7 @@
 <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
 [<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
 
 <chapter id='overview-yp'>
     <title>Introducing the Yocto Project</title>
diff --git a/poky/documentation/overview-manual/overview-manual.xml b/poky/documentation/overview-manual/overview-manual.xml
index 210d644..8021a2e 100755
--- a/poky/documentation/overview-manual/overview-manual.xml
+++ b/poky/documentation/overview-manual/overview-manual.xml
@@ -1,6 +1,7 @@
 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
 [<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
 
 <book id='overview-manual' lang='en'
       xmlns:xi="http://www.w3.org/2003/XInclude"