diff --git a/booking.variety_form.inc b/booking.variety_form.inc
index ad007d2..4b9eef4 100644
--- a/booking.variety_form.inc
+++ b/booking.variety_form.inc
@@ -41,6 +41,20 @@ function booking_variety_regn_form($node, &$form_state)
     ),	      
   );
 
+  $form['identity']['booking_lastname'] = array(
+    '#type' => 'textfield',
+    '#title' => t('Surname'),
+    '#description' => t('Please enter your last name as it appeared when you registered.'),
+    '#size' => 60,	
+    '#required' => TRUE,
+    '#default_value' => !empty($data->booking_lastname) ? $data->booking_lastname : '',
+    '#ajax' => array(
+      'event' => 'change',
+      'wrapper' => 'booking_variety_session_fieldset_wrapper',
+      'callback' => 'booking_variety_session_form_callback',
+    ),	      
+  );  
+
   $form['variety-sessions'] = array(
     '#type' => 'fieldset',
     '#title' => 'Select Variety Sessions',
@@ -48,6 +62,10 @@ function booking_variety_regn_form($node, &$form_state)
     '#suffix' => '</div>'
   );  
 
+  $form['variety-sessions']['booking_feedback_wrapper'] = array(
+    '#markup' => '<div id="booking_feedback_wrapper"></div>',
+  );   
+
   //for each entry in the variety timeslot table, create a new form select item
   foreach($result as $timeslot) {
     $fieldname = 'select-variety-' . $timeslot->tid;
@@ -104,6 +122,7 @@ function _booking_get_variety_timeslot_options($timeslot_id) {
  */
 function booking_variety_session_form_callback($form, &$form_state) {
   $form_state['rebuild'] = TRUE;
+  $form['form']['variety-sessions']['booking_feedback_wrapper']['#markup'] = '<div id="booking_feedback_wrapper">Test</div>';
   return $form['form']['variety-sessions'];
 }
 
@@ -133,6 +152,7 @@ function booking_variety_regn_form_validate($form, &$form_state) {
   $db_and->condition('p.booking_eventid', $event->eid, '=');
   $db_and->condition('p.booking_status', 1, '=');
   $db_and->condition('p.nid', $values['booking_nid'], '=');
+  $db_and->condition('p.booking_lastname', $values['booking_lastname'], '=');
 
   $query = db_select('booking_person', 'p');
   $query->condition($db_and)
@@ -141,7 +161,7 @@ function booking_variety_regn_form_validate($form, &$form_state) {
     ->fetchObject();  
 
   if (! $person) {
-    form_set_error('booking_nid', t('You have entered an invalid booking reference number.'));
+    form_set_error('booking_nid', t('You have entered an invalid booking reference number or your surname does not match your registration details.'));
   }
 
   // --- Check that this person hasn't already registered for variety sessions