Roland Perry wrote:

And in Germany BOGOF is outlawed as 'unfair competition' (no, I don't
get it either),

Unh?

ISTR hearing an edition of "more or less" on R4 recently which
explained, somewhat tediously, how it is that all the supermarkets
can guarantee to be cheaper than each other. It was a bit like
listening to a poor edition of "you and yours", which is saying
something.

It may have been in the same segment that they went on to express
shock and horror that buying, say, a bag of apples for a quid might
work out much more expensive than buying them loose in the same
supermarket, that sometimes two half-kilos is cheaper than one
single kilo, blah, blah, and blah.