lenses
jonbon,
Youre entitled to ask for your lense prescription off your optician. In your case specsavers. Use it to get your lenses online. Looking at coastals website they do the main brands (bausch&lombe, acuvue etc) who are all trustworthy brands.
May I also add the following recommendation.
Ive found an optician in fizzboro, jr manuel, who orders mine in at the same price as getlenses. (try and get specsavers to do that!!). He orders in a make that he doesnt normally stock for me. This was just by asking after showing him the order form from getlenses.