Update: This deal is now available from ASDA Direct at http://direct.asda.com/on/demandware.store/Sites-ASDA-Site/default/Search-Show?pmid=ent-bluray-2-for-12
with a larger selection available for the range.
I was in ASDA earlier on and they had a selection of Blu-Rays for £8 each or 2 for £12, therefore reducing the price of each Blu-Ray by £2 down from £8 to £6 each.
I cannot quite remember the entirety of the selection of Blu-Rays, but they included:
Alan Partridge: Alpha Papa
Insidious: Part 2
The Expendables II