Part of the E3 Specials, seems to be the pick of the bunch:
Corsair Vengeance 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit
1600MHz RAM Speed, CAS 9-9-9-24 Timings,
Lifetime Warranty with Corsair.
At Scan.co.uk it is £76.94 (http://www.scan.co.uk/products/8gb-%282x4gb%29-corsair-ddr3-vengeance-pc3-12800-%281600%29-non-ecc-unbuffered-cas-9-9-9-24-xmp-150v)
At Ebuyer it is £85 (http://www.ebuyer.com/product/248846)
For Free Next Day Delivery enter the code: FREEDEL11 when you are in the Basket.
Be sure to change the Delivery Option to "Friday June 10th FREE NEXT DAY DELIVERY" option.