I went to my local to see if i could pick up sleeping beauty after reading family fry's post. I got sleeping beauty for £7.50, Iron Man for £10.50, Babylon AD for £7.50 & RocknRolla for £5.99. I also used the £5 voucher off a £25 spend & got all four blu rays for £26.49 :).
I bought the only copy of iron man, sleeping beauty, & babylon ad (although there was more copies of babylon ad & sleeping beauty in their blu ray folder but i didn't see the cases upstairs). But there was another 3 copies of rocknrolla left aswell as other blu rays like indiana jones, the duchess & some others i can't remember.