The UK hasn't issued none JAR licenses for years.
There are how ever a sub set of license holders who converted an ICAO with the UK and are meant to be G reg only but i haver never heard of any of them having any problems flying other regs.
Type ratings are what ever your NAA will accept. It just so happens that the UK will accept any JAR approved course and examinors as long as you back it up with copys of all the approvals. So you send in a copy of the sim approval, the TRTO and the TRE exam auth and they will process it.