Thanks for the advice! 6 buttons eh? I'm going to have to look at the other GT's see if this is something missing, maybe they just put GT in the name?
I may be wrong, but I think the UK GT Roadster came without the phone option and therefore had only three buttons on the steering wheel (on the right for cruise)
(PM Martinmac for confirmation)
Also Rays were a £1000 option on a '55 reg