You can change your referees' details only before you send your application to us.
Log back on to your application, go into the Reference section and then click on the appropriate 'Edit' button(s) to change the details for your principal and/or or second referee. When you have made your changes, you need to mark the Check form section as complete. If you have changed the details for your principal referee, you also need to go back into the Reference section and click on the 'Send reference request' button to obtain a reference.