The Mayor showed off one of London's "Boris bikes" in Beijing, joking about the cycle hire scheme being "communist".
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It's emerged commuters in the south are paying almost £1bn to help keep trains running in the north.
The number of millionaires living in London has shot up in the part five years but other parts of the country are catching up.
A three-year-old girl had to undergo surgery to remove an air rifle pellet after she was shot in a west London park.