I don't know if it's of any use to you, but the CAA, on the basis of my NPPL SLMG rating, entered into my EASA CPL(A) license a TMG rating, without requiring any paperwork.
(I couldn't have a sailplane license issued: the CAA said they wouldn't do it, so I lost the right to fly a non TMG motorglider, and to fly a glider as well)