PlayStation Plus: 12 Month Membership £35.95 @ The Game Collection
Save a little extra compared to the £37.49 deal at Amazon, Game and Smyths.
Also available on the PlayStation Store @ £37.49 for lapsed/non-active subscribers. Buy some discounted PSN Credit via CD Keys for the best value (.e.g £35 credit is £29.99 on CD Keys).
* Please note that all prices are correct at the time of posting. However prices can vary quickly and significantly without warning.