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Road rage cyclist assault filmed

12 July 2011 Last updated at 20:17 BST

A cyclist has posted footage online of a road-rage assault on his friend in an attempt to catch the attacker.

Simon Page, 49, was punched in the head by a car driver in Bexley High Street, Bexley, south-east London, in May.

Mr Page was one of seven cyclists riding from Dover to London in training for a charity ride to Paris when the attack happened.