blisters - i am in cheltenham 
are you a member of triteamglos yet!!!
there is a tri shop in bristol if that helps.
i got my 3 hire wetsuit from the mytriathlon website, after a recommendation. I rang them with my amateur questions, they asked me to email them my measurements and budget. which i did. they suggested a medium zone 3 aspire which i was
about as i wanted a 2XU. but they talked me round (and it was cheaper) and it fits REALLY well and i am so happy with it!!! I think it was £125 or something, well chuffed.
I promptly put a small hole in it when i was trying it on for the first time, must read instructions properly!!! So i am glad i didnt buy new!!!