diff --git a/atlas/templates/atlas/collection_case_displaysetup.html b/atlas/templates/atlas/collection_case_displaysetup.html
index 7d77bf30..b2a20b99 100644
--- a/atlas/templates/atlas/collection_case_displaysetup.html
+++ b/atlas/templates/atlas/collection_case_displaysetup.html
@@ -30,7 +30,7 @@
                 document.getElementById('viewerstate-save-response').innerHTML = "<span class='text-danger'>Viewer state could not be retrieved.</span>";
                 return;
             }
-            fetch({% if case_number %}"{% url 'atlas:collection_case_displaysetup' casedetail.collection.pk case_number=case_number %}"{% else %}"{% url 'atlas:collection_case_displaysetup_legacy' casedetail.collection.pk casedetail.case.pk %}"{% endif %}, {
+            fetch({% if case_number %}"{% url 'atlas:collection_case_displaysetup' casedetail.collection.pk case_number %}"{% else %}"{% url 'atlas:collection_case_displaysetup_legacy' casedetail.collection.pk casedetail.case.pk %}"{% endif %}, {
                 method: "POST",
                 headers: {
                     "Content-Type": "application/json",
@@ -47,7 +47,7 @@
                 });
         });
         document.getElementById('reset-viewerstate').addEventListener('click', function() {
-            fetch({% if case_number %}"{% url 'atlas:collection_case_displaysetup' casedetail.collection.pk case_number=case_number %}"{% else %}"{% url 'atlas:collection_case_displaysetup_legacy' casedetail.collection.pk casedetail.case.pk %}"{% endif %}, {
+            fetch({% if case_number %}"{% url 'atlas:collection_case_displaysetup' casedetail.collection.pk case_number %}"{% else %}"{% url 'atlas:collection_case_displaysetup_legacy' casedetail.collection.pk casedetail.case.pk %}"{% endif %}, {
                 method: "POST",
                 headers: {
                     "Content-Type": "application/json",
diff --git a/atlas/templates/atlas/collection_case_view_take.html b/atlas/templates/atlas/collection_case_view_take.html
index ba28b169..24748203 100644
--- a/atlas/templates/atlas/collection_case_view_take.html
+++ b/atlas/templates/atlas/collection_case_view_take.html
@@ -81,9 +81,9 @@
         <div>
 
             {% if question_completed %}
-                <iframe id="viewer" style="width: 100%; height: 100%; border: none; padding: 0px; min-height: 700px" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json_review' collection.pk case_number=case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_review_legacy' collection.pk case.pk %}{% endif %}"></iframe>
+                <iframe id="viewer" style="width: 100%; height: 100%; border: none; padding: 0px; min-height: 700px" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json_review' collection.pk case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_review_legacy' collection.pk case.pk %}{% endif %}"></iframe>
             {% else %}
-                <iframe id="viewer" style="width: 100%; height: 100%; border: none; padding: 0px; min-height: 700px" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json' collection.pk case_number=case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_legacy' collection.pk case.pk %}{% endif %}"></iframe>
+                <iframe id="viewer" style="width: 100%; height: 100%; border: none; padding: 0px; min-height: 700px" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json' collection.pk case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_legacy' collection.pk case.pk %}{% endif %}"></iframe>
             {% endif %}
 
         </div>
@@ -93,9 +93,9 @@
     {% if collection.show_ohif_viewer_link %}
         <div>
             {% if question_completed %}
-                <a target="_blank" href="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json_review' collection.pk case_number=case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_review_legacy' collection.pk case.pk %}{% endif %}" title="Click to open the case in the advanced viewer. This will open in a new tab/window."><button class="viewer"><i class="bi bi-collection"></i> Launch advanced viewer.</button></a>
+                <a target="_blank" href="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json_review' collection.pk case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_review_legacy' collection.pk case.pk %}{% endif %}" title="Click to open the case in the advanced viewer. This will open in a new tab/window."><button class="viewer"><i class="bi bi-collection"></i> Launch advanced viewer.</button></a>
             {% else %}
-                <a target="_blank" href="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json' collection.pk case_number=case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_legacy' collection.pk case.pk %}{% endif %}" title="Click to open the case in the advanced viewer. This will open in a new tab/window."><button class="viewer"><i class="bi bi-collection"></i> Launch advanced viewer.</button></a>
+                <a target="_blank" href="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json' collection.pk case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_legacy' collection.pk case.pk %}{% endif %}" title="Click to open the case in the advanced viewer. This will open in a new tab/window."><button class="viewer"><i class="bi bi-collection"></i> Launch advanced viewer.</button></a>
             {% endif %}
         </div>
     {% endif %}
diff --git a/atlas/templates/atlas/partials/_prior_card.html b/atlas/templates/atlas/partials/_prior_card.html
index f358c777..78d44bf1 100644
--- a/atlas/templates/atlas/partials/_prior_card.html
+++ b/atlas/templates/atlas/partials/_prior_card.html
@@ -51,7 +51,7 @@
                 {% else %}
                     <form
                         {% if case_number %}
-                            hx-post="{% url 'atlas:collection_case_priors' collection.id case_number=case_number %}"
+                            hx-post="{% url 'atlas:collection_case_priors' collection.id case_number %}"
                         {% else %}
                             hx-post="{% url 'atlas:collection_case_priors_legacy' collection.id casedetail.case.pk %}"
                         {% endif %}