So is there any chance of the UK adopting 'type' in the callsign? If any mandarins are reading this, please take note: it would be an important ancilliary to the new safety frequency to know the type of the other aircraft in each call.
Read the CAP413 which details the required UK callsign phraseology. You already can if you wish, however you need to use the
full callsign until the ground station abbreviates it;
e.g Piper G-BSZT which can then be abbreviated to Piper ZT.