H'mm, £320 seems a bit steep (though cheap compared to *******s). I'm assuming JBS Autodesign is the type of place that does upgrades and mods etc..

I've had a quote from my local garage who does my MOT and Servicing. He charges £35/hr labour and said it was upt 2hr job including rollers and water pump. The parts I'm guessing will propbably cost upto £75. So I would be looking at £150 for a cambelt change.