Not all of them obviously. And I don't mean that individuals are unusually thin. More than the population as a whole seems to be much thinner than the UK population in general.
I went in to London yesterday evening to meet a friend who was very late so I had lots of time to indulge my nosy, people watching habit (usually I just rush from A to B and don't look at anyone). And after a while it really struck me that almost everyone was slim.
So, now I'm wondering if it was a coincidental thing or not. And if not, then why is this?
Because so many people don't have or don't use a car?
Because, on average, the population of London is perhaps younger than the UK average?
Because, on average, Londoners are wealthier than the UK average?
Because so many artsy people whose weight/looks affect their jobs in some way live in London?
Because London is more multicultural than anywhere else and some ethnicities are genetically smaller and some cultures eat a different (better?) diet?
Or something else I haven't thought of.
I just thought it was interesting. Apologies if it really isn't!