diff --git a/src/main/java/gov/cabinetoffice/gap/adminbackend/validation/validators/AdvertPageResponseValidator.java b/src/main/java/gov/cabinetoffice/gap/adminbackend/validation/validators/AdvertPageResponseValidator.java
index 642588e6..e6da6264 100644
--- a/src/main/java/gov/cabinetoffice/gap/adminbackend/validation/validators/AdvertPageResponseValidator.java
+++ b/src/main/java/gov/cabinetoffice/gap/adminbackend/validation/validators/AdvertPageResponseValidator.java
@@ -216,7 +216,7 @@ private SimpleEntry<String, String> validateURL(GrantAdvertQuestionResponse ques
         // (incl. .com) (repeating) |
         // (optional) slash | (optional) additional path | (optional) slash |
         // (optional) query params
-        String urlValidPattern = "^(http://|https://)(www.)?((?!www)[a-zA-Z0-9\\-]{2,}+)(\\.[a-zA-Z0-9\\-]{2,})+(/)?(/[a-z0-9\\-._~%!$&'()*+,;=:@]+)*?(/)?(\\?[a-z0-9\\-._~%!$&'()*+,;=:@/]*)?$";
+        String urlValidPattern = "^(http://|https://)(www.)?((?!www)[a-zA-Z0-9\\-]{2,}+)(\\.[a-zA-Z0-9\\-]{2,})+(/)?(/[a-z0-9\\-._~%!$&'()*+,;=:@#]+)*?(/)?(\\?[a-z0-9\\-._~%!$&'()*+,;=:@#/]*)?$";
         Pattern pattern = Pattern.compile(urlValidPattern, Pattern.CASE_INSENSITIVE);
         Matcher matcher = pattern.matcher(question.getResponse());
 
diff --git a/src/test/java/gov/cabinetoffice/gap/adminbackend/validation/validators/AdvertPageResponseValidatorTest.java b/src/test/java/gov/cabinetoffice/gap/adminbackend/validation/validators/AdvertPageResponseValidatorTest.java
index 3d5e622b..a525ddb4 100644
--- a/src/test/java/gov/cabinetoffice/gap/adminbackend/validation/validators/AdvertPageResponseValidatorTest.java
+++ b/src/test/java/gov/cabinetoffice/gap/adminbackend/validation/validators/AdvertPageResponseValidatorTest.java
@@ -928,7 +928,8 @@ private static Stream<Arguments> validUrls() {
                 Arguments.of("https://www.google.co.uk/long/path?query=var&query2=var"),
                 Arguments.of("http://www.google.co.uk/long/path?query=var&query2=var"),
                 Arguments.of("https://google.co.uk/long/path?query=var&query2=var"),
-                Arguments.of("http://google.co.uk/long/path?query=var&query2=var"));
+                Arguments.of("http://google.co.uk/long/path?query=var&query2=var"),
+                Arguments.of("https://google.co.uk/competition/1989/overview/63441f1e-850b-4581-986d-cd2f6c6c226d#summary"));
     }
     // @formatter:on