How can anyone get THAT fat???
The diet over there is very high in ultraprocessed foods; plenty of additives that aren't allowed in more developed societies due to health risks and a lot of something called corn starch.
A lot of the stuff in supermarkets there, even well known brands, are on the level of the stuff we only see in food discounters like Iceland and some of the ones that you probably don't have in London but plague the large council estates in the north, companies like Fulton or Heron.
Female obesity there is particularly bad. It's sort of the opposite of Europe in the Medieval period or parts of Africa now, except rather than the rich being fat and the poor thin, over there it's more common that the rich are thin and the poor fat.