Popped into the Tesco Express on Blenheim Terrace in Leeds City Centre this afternoon for my lunch, and got a box of mince pies.
6 pack boxes of Mr Kipling Mince Pies, reduced to clear at £0.25.
Won't be national, I don't think, but might be worth checking your local Express stores if you're going in for lunch or lottery tickets etc. :)
Hope it helps somebody! No 'wild goose' comments, please, I'm sure somebody else in Leeds will benefit :)