In my local ASDA last night (Liverpool Breck Road). They had a sale section for games. All PS4 titles seems to have been picked clean. Only XB1, Vita,360,PS3 games where left accept for FIFA 14 for PS4 for a fiver.
Anyhow I managed to pick up Dark Souls 3 for the XB1 for £10 and it also comes with a digital download for Dark Souls 1. Also got Gravity Rush for the Vita for £5.
I was hoping for the PS4 version of Dark Souls as well but they wanted £45 for it.
Sale is national but it depends on your locals stock.