In store today, cooperative midlands, 2 packs of 5 large donuts for £1 total. Custard and/or Jam Donuts. Lichfield shop, but assume @ others.
Seemed a reasonable deal, alongside some of their sandwiches for £1 too, making a cheap lunch etc. Assumed to be offline ie. in-store only.
NB - image is a standard donut image, not the actual donuts for sale.