London has the best levels of good health among its population, according to the census - at 84%, compared with 81% nationally.
The city also has relatively few people whose daily activities are limited because of disabilities or health problems - with the London borough of Wandsworth bottom of the list for all local authorities.
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Police say he may have attacked more children and urged them to come forward.
The suspect walked up to a Tesco employee and shoulder barged him to the ground before punching him repeatedly in the face.
Up to 200 noisy motorists regularly meet in Imperial Way, Croydon attracting crowds of up to 400 people.