diff --git a/iati/templates/base.html b/iati/templates/base.html
index c93ab15b..05b8bcff 100644
--- a/iati/templates/base.html
+++ b/iati/templates/base.html
@@ -39,6 +39,9 @@
{% block extra_css %}
{# Override this in templates to add extra stylesheets #}
{% endblock %}
+
+ {% block html_header_seo %}
+ {% endblock %}
diff --git a/iati_standard/models.py b/iati_standard/models.py
index 1d13e9c0..a32d82de 100644
--- a/iati_standard/models.py
+++ b/iati_standard/models.py
@@ -1,6 +1,7 @@
"""Model definitions for the iati_standard app."""
import os
+import re
from bs4 import BeautifulSoup
from datetime import datetime
@@ -397,10 +398,19 @@ def save(self, *args, **kwargs):
class ActivityStandardPage(AbstractGithubPage):
- """A model for the Activity Standard Page, an IATI reference page."""
+ """A model for the Activity Standard Page, an IATI reference page.
+
+ Used for Standard reference pages like /en/iati-standard/202/
+ And guidance developer pages like /en/guidance/developer/
+ """
template = 'iati_standard/activity_standard_page.html'
+ def is_older_version_of_standard(self):
+ """Is it an older version of the standard. Return Boolean."""
+ url = self.get_url()
+ return re.match(r"^\/\w+\/iati-standard\/\d", url) and not re.match(r"^\/\w+\/iati-standard\/203\/", url)
+
class StandardGuidancePage(AbstractGithubPage):
"""A model for the Standard Guidance Page, an IATI reference page."""
diff --git a/iati_standard/templates/iati_standard/activity_standard_page.html b/iati_standard/templates/iati_standard/activity_standard_page.html
index cd293fd6..e4567f20 100644
--- a/iati_standard/templates/iati_standard/activity_standard_page.html
+++ b/iati_standard/templates/iati_standard/activity_standard_page.html
@@ -23,6 +23,10 @@
{% endblock %}
+{% block html_header_seo %}
+{% if page.is_older_version_of_standard %}{% endif %}
+{% endblock %}
+
{% block content %}
{% get_current_language as LANGUAGE_CODE %}