diff --git a/app/main/views/sub_navigation_dictionaries.py b/app/main/views/sub_navigation_dictionaries.py
index 05c9954bb..1d30f6606 100644
--- a/app/main/views/sub_navigation_dictionaries.py
+++ b/app/main/views/sub_navigation_dictionaries.py
@@ -84,6 +84,10 @@ def using_notify_nav():
                     "name": "Upload a letter",
                     "link": "main.upload_a_letter",
                 },
+                {
+                    "name": "Letter specification",
+                    "link": "main.letter_specification",
+                },
             ]
         },
         {
diff --git a/app/templates/views/uploads/choose-file.html b/app/templates/views/uploads/choose-file.html
index 173d78f32..a9b863601 100644
--- a/app/templates/views/uploads/choose-file.html
+++ b/app/templates/views/uploads/choose-file.html
@@ -35,7 +35,7 @@
     )}}
   </p>
 
-    <p class="govuk-body">Your file must meet our <a href="#">letter specification</a>.</p>
+    <p class="govuk-body">Your file must meet our <a class="govuk-link" href="{{ url_for('main.letter_specification') }}">letter specification</a>.</p>
   </div>
 </div>
 {% endblock %}
diff --git a/app/utils.py b/app/utils.py
index 0d254d27b..494d7c261 100644
--- a/app/utils.py
+++ b/app/utils.py
@@ -623,14 +623,14 @@ LETTER_VALIDATION_MESSAGES = {
         'detail': (
             'You need to change the size or orientation of {invalid_pages}. <br>'
             'Files must meet our '
-            '<!--replace links to the PDF with links to the new page--><a class="govuk-link govuk-link--destructive" href="{letter_spec_guidance}" target="_blank">'
+            '<a class="govuk-link govuk-link--destructive" href="{letter_spec_guidance}" target="_blank">'
             'letter specification'
             '</a>.'
         ),
         'summary': (
             'Validation failed because {invalid_pages} {invalid_pages_are_or_is} not A4 portrait size.<br>'
             'Files must meet our '
-            '<a class="govuk-link govuk-link--no-visited-state" href="{letter_spec}" target="_blank">'
+            '<a class="govuk-link govuk-link--no-visited-state" href="{letter_spec_guidance}">'
             'letter specification'
             '</a>.'
         ),
@@ -640,14 +640,14 @@ LETTER_VALIDATION_MESSAGES = {
         'detail': (
             'You need to edit {invalid_pages}.<br>'
             'Files must meet our '
-            '<a class="govuk-link govuk-link--destructive" href="{letter_spec_guidance}" target="_blank">'
+            '<a class="govuk-link govuk-link--destructive" href="{letter_spec_guidance}">'
             'letter specification'
             '</a>.'
         ),
         'summary': (
             'Validation failed because content is outside the printable area on {invalid_pages}.<br>'
             'Files must meet our '
-            '<a class="govuk-link govuk-link--no-visited-state" href="{letter_spec}" target="_blank">'
+            '<a class="govuk-link govuk-link--no-visited-state" href="{letter_spec_guidance}" target="_blank">'
             'letter specification'
             '</a>.'
         ),
@@ -689,7 +689,7 @@ LETTER_VALIDATION_MESSAGES = {
         'summary': (
             'Validation failed because the address block is empty.<br>'
             'Files must meet our '
-            '<a class="govuk-link govuk-link--no-visited-state" href="{letter_spec}" target="_blank">'
+            '<a class="govuk-link govuk-link--no-visited-state" href="{letter_spec_guidance}" target="_blank">'
             'letter specification'
             '</a>.'
         ),
@@ -791,13 +791,13 @@ def get_letter_validation_error(validation_message, invalid_pages=None, page_cou
             invalid_pages=invalid_pages,
             invalid_pages_are_or_is=invalid_pages_are_or_is,
             page_count=page_count,
-            letter_spec_guidance=url_for('.upload_a_letter')
+            letter_spec_guidance=url_for('.letter_specification')
         ),
         'summary': LETTER_VALIDATION_MESSAGES[validation_message]['summary'].format(
             invalid_pages=invalid_pages,
             invalid_pages_are_or_is=invalid_pages_are_or_is,
             page_count=page_count,
-            letter_spec=url_for('.letter_spec'),
+            letter_spec_guidance=url_for('.letter_specification'),
         ),
     }
 
diff --git a/tests/app/test_utils.py b/tests/app/test_utils.py
index 11cf42645..295710df8 100644
--- a/tests/app/test_utils.py
+++ b/tests/app/test_utils.py
@@ -586,13 +586,11 @@ def test_get_letter_validation_error_for_known_errors(
 
     assert detail.text == expected_content
     if detail.select_one('a'):
-        assert detail.select_one('a')['href'] == url_for('.upload_a_letter')
-        assert detail.select_one('a')['target'] == '_blank'
+        assert detail.select_one('a')['href'] == url_for('.letter_specification')
 
     assert summary.text == expected_summary
     if summary.select_one('a'):
-        assert summary.select_one('a')['href'] == url_for('.letter_spec')
-        assert summary.select_one('a')['target'] == '_blank'
+        assert summary.select_one('a')['href'] == url_for('.letter_specification')
 
 
 @pytest.mark.parametrize("date_from_db, expected_result", [