Asda's real ale selection is woeful and there are no craft beers whatsoever. This leaves the only option as Morrisons in Bredbury unless someone can tell me otherwise.
AFAIK neither Asda nor Morrison's sell 'real ale' at the moment - real ale meaning a bottle conditioned beer, such as Worthington White Shield, which has a sediment in the bottom of the bottle. However, a few perfectly acceptable 'unreal' beers can be found at both of these, such as Old Speckled Hen, Abbott and Bishop's Finger, and Asda sell these at £5 for four half-litre bottles, which is not a bad price.