Dear Avrodriver,
You have to give the CAA a call or go to their website to see the list of APPROVED TRTOs and the type of aircraft they offer.
Dont forget that you will need to get the base flight in order to get your licence issued,so make sure the TRTO you join has the actual aircraft to conduct such test(not only the sim part).
You will have to be observed by a CAA examiner not only a TRE.
You will be assessed on both the I/R(raw data flying;ir rules..)and the type rating itself.
Find someone to share the time its cheaper..make sure the fellow agrees to be observed by the CAA though.Heard one was failed on the IR when he wasnt supposed to be checked!!...
6 months is a good figure..the TRTO may get some earlier if they have good contacts with the CAA lady.
If you have more than 500 hours on Type(not sic checkout) on AC like Boeing,Airbus...you may need only to sit 3 exams.not the 14.
Hope this helps,
Safe flying,
M.85