they actually do that in the local corner shop heer!
There was a man trying to pay with a milk token and the woman behind the counter said "no milk tokens are only worth £2 you will have to give me another one" and took 2 milk tokens for cigs!
(
woe kitten woe unto thee,
Sun 21 May 2006, 1:15,
archived)
dunno...
but "scum" is easier to spell
(
woe kitten woe unto thee,
Sun 21 May 2006, 1:52,
archived)