I went into Asda tonight and picked up a few of their £1.00 miniature bottles of wine to try. When I paid I got a voucher for each of them for £1.50 off the full size version!
Basically thats 50p off plus a glass free! Bought 4 small bottles and got 4 different vouchers, all valid until 31st March.
They were all white btw but I think they had red too and it was the Runcorn Asda.