Was in my local WH Smith in Belfast and noticed a selection of blu-rays at "half marked price" including:
Sex and the City
One Missed Call
I bought Sex and the City for the wife and Hulk for me - £9.50 total! They also had a few blu-rays in a 3 for £10 including Ocean's Thirteen, Eragon, Hitch and Santa Clause 3. There may have been others.