diff --git a/mod/assign/gradingtable.php b/mod/assign/gradingtable.php
index ca436bb285c..48430d8cd07 100644
--- a/mod/assign/gradingtable.php
+++ b/mod/assign/gradingtable.php
@@ -273,6 +273,14 @@ class assign_grading_table extends table_sql implements renderable {
             $columns[] = 'fullname';
             $headers[] = get_string('fullname');
 
+            // MDL-52269 - Participant # details if can view real identities.
+            if ($this->assignment->is_blind_marking()) {
+                if (!$this->is_downloading()) {
+                    $columns[] = 'recordid';
+                    $headers[] = get_string('recordid', 'assign');
+                }
+            }
+
             foreach ($extrauserfields as $extrafield) {
                 $columns[] = $extrafield;
                 $headers[] = get_user_field_name($extrafield);