Do I need to transfer visa stamps to my new UK passport when leaving Thailand?

The post discusses whether the individual needs to transfer visa stamps from an old UK passport to a new one when leaving Thailand. There's confusion between advice received from Lak Si immigration and the Bangkok HMPO office. The consensus in the comments suggests that if the person is leaving before their visa extension stamp expires, they can simply present both passports at the airport for departure without needing a transfer of stamps.