diff --git a/DigitalLearningSolutions.Data.Migrations/202503111500_AddLastAccessedColumn.cs b/DigitalLearningSolutions.Data.Migrations/202503111500_AddLastAccessedColumn.cs
new file mode 100644
index 0000000000..95a0eb6020
--- /dev/null
+++ b/DigitalLearningSolutions.Data.Migrations/202503111500_AddLastAccessedColumn.cs
@@ -0,0 +1,26 @@
+namespace DigitalLearningSolutions.Data.Migrations
+{
+    using FluentMigrator;
+
+    [Migration(202503111500)]
+    public class AddLastAccessedColumn : Migration
+    {
+        public override void Up()
+        {
+            Alter.Table("Users").AddColumn("LastAccessed").AsDateTime().Nullable();
+            Alter.Table("DelegateAccounts").AddColumn("LastAccessed").AsDateTime().Nullable();
+            Alter.Table("AdminAccounts").AddColumn("LastAccessed").AsDateTime().Nullable();
+
+            Execute.Sql("UPDATE u SET LastAccessed = (SELECT MAX(s.LoginTime) FROM DelegateAccounts da JOIN Sessions s ON da.ID = s.CandidateId WHERE da.UserID = u.ID) FROM users u;");
+            Execute.Sql("UPDATE da SET LastAccessed = (SELECT MAX(s.LoginTime) FROM Sessions s WHERE s.CandidateId = da.ID) FROM DelegateAccounts da;");
+            Execute.Sql("UPDATE da SET LastAccessed = (SELECT ca.LastAccessed FROM CandidateAssessments ca WHERE ca.ID = da.ID) FROM DelegateAccounts da where da.LastAccessed IS NULL;");
+            Execute.Sql("UPDATE AA SET LastAccessed = (SELECT MAX(AdS.LoginTime) FROM AdminSessions AdS WHERE AdS.AdminID = AA.ID) FROM AdminAccounts AA;");
+        }
+        public override void Down()
+        {
+            Delete.Column("LastAccessed").FromTable("Users");
+            Delete.Column("LastAccessed").FromTable("DelegateAccounts");
+            Delete.Column("LastAccessed").FromTable("AdminAccounts");
+        }
+    }
+}