diff --git a/src/Model/BlogController.php b/src/Model/BlogController.php
index 445be05..4bc5565 100644
--- a/src/Model/BlogController.php
+++ b/src/Model/BlogController.php
@@ -6,6 +6,7 @@ use PageController;
 use SilverStripe\Control\Director;
 use SilverStripe\Control\RSS\RSSFeed;
 use SilverStripe\ORM\ArrayList;
+use SilverStripe\ORM\DataList;
 use SilverStripe\ORM\FieldType\DBDatetime;
 use SilverStripe\ORM\PaginatedList;
 use SilverStripe\Security\Member;
@@ -67,7 +68,7 @@ class BlogController extends PageController
     /**
      * Renders a Blog Member's profile.
      *
-     * @return HTTPResponse
+     * @return string
      */
     public function profile()
     {
@@ -121,7 +122,7 @@ class BlogController extends PageController
     /**
      * Renders an archive for a specified date. This can be by year or year/month.
      *
-     * @return null|HTTPResponse
+     * @return null|string
      */
     public function archive()
     {
@@ -212,7 +213,7 @@ class BlogController extends PageController
     /**
      * Renders the blog posts for a given tag.
      *
-     * @return null|HTTPResponse
+     * @return null|string
      */
     public function tag()
     {
@@ -258,7 +259,7 @@ class BlogController extends PageController
     /**
      * Renders the blog posts for a given category.
      *
-     * @return null|HTTPResponse
+     * @return null|string
      */
     public function category()
     {
@@ -440,7 +441,7 @@ class BlogController extends PageController
      *
      * @example "<% if $PaginationAbsoluteNextLink %><link rel="next" href="$PaginationAbsoluteNextLink"><% end_if %>"
      *
-     * @return string
+     * @return string|null
      */
     public function PaginationAbsoluteNextLink()
     {
@@ -448,6 +449,8 @@ class BlogController extends PageController
         if ($posts->NotLastPage()) {
             return Director::absoluteURL($posts->NextLink());
         }
+
+        return null;
     }
 
      /**
@@ -456,7 +459,7 @@ class BlogController extends PageController
      *
      * @example "<% if $PaginationAbsolutePrevLink %><link rel="prev" href="$PaginationAbsolutePrevLink"><% end_if %>"
      *
-     * @return string
+     * @return string|null
      */
     public function PaginationAbsolutePrevLink()
     {
@@ -464,6 +467,8 @@ class BlogController extends PageController
         if ($posts->NotFirstPage()) {
             return Director::absoluteURL($posts->PrevLink());
         }
+
+        return null;
     }
 
     /**
@@ -486,7 +491,7 @@ class BlogController extends PageController
     /**
      * Returns the current archive date.
      *
-     * @return null|Date
+     * @return null|DBDatetime
      */
     public function getArchiveDate()
     {