Less amusingly, exploitation of berry pickers.
Apparently Morrisons sells jars of bilberries from Poland (where they are presumably picked by Poles), and any potential radioactivity doesn't present a health hazard. Alas, I don't have a local Morrisons. I shall have to go to Ilkley Moor when in the north later this month.
ETA: Comments frozen as nude hikers appear to attract lots of spam!