Supermarkets in the UK have decided that they will only buy fruits and vegetables that looked like they have decided they should look like, hence a colossal waste that stays with the producers.

Then not everything the purchasing centre buys will end up on a shelf.

Then they generate waste by not selling until it's too late.

Then food portions are too big and are not finished (at restaurants, or if you buy ready meals).

Then the more people cook for themselves, the better they may match what they buy with what they eat, but that's not a UK specialty either.
Then lots of things are bought and eventually not consumed.

All in all, I heard the estimate that in the UK, slightly over 50% of the food is thrown away. Now that's massive. That may include bones, or vegetables and fruits skins, so that would not be quite as bad, but still huge.

Earth provides enough to satisfy every man's need, but not every man's greed. Gandhi