This was a shockingly violent attack on a man who was simply attempting to prevent the robbery of his bag.
I would urge anyone who saw what happened, or who has information about those responsible, to make contact with police.
More top news
London Fire Brigade have confirmed six fire engines are containing a fire in Hackney.
Scientists are appealing to find 'one in a million' snail a mate
A murder investigation has begun after a man was stabbed to death in Wood Green, north London.