Just been to Tesco on Abbeydale Road in Sheffield - I bought a couple of bottles of Theakstons XB which is a pretty nice ale imho and they charged me 85p per bottle when the label said £1.48 (i think).
I didn't go back to get more even tho I noticed in the store as I was in a rush. But I might do later :-)
I have no clue if its nationwide mistake or if its online but there you go, cheap nice ale
edit: I couldn't find it online but some1 a few posts down did. I was sure it said £1.48 at the store and was charged wrong - might of been pending offer anyway - just edited the title to reflect this and added online vouchers.