Mrs goes to Asda as it gives her an excuse to wander through the George bit for clothes for the 2 youngest.
Do Tesco sometimes but as Garinda has said putting money in Shirley's pocket fills me with revulsion.
And yes before anyone starts going I know all about Wallmart.
The other main reason is that Asda in Accy is a lot more convenient.
(They also sell tinned Vimto and Tesco doesn't
)