The water pistol fight that ended in teenager being stabbed to death

Freddy, 18, can be seen holding a harmless giant water pistol as he larks around with his friends in the photo taken at  4.48pm on Thursday.

They were taking part in the organised Summer Splash water fight in Holland Park.

Freddy Moody, circled on right, with friends in Holland Park just two hours before he was knifed to death in Stockwell

But friends claim a row erupted with a gang and Freddy was killed yards from his home in Stockwell shortly after 7pm after going back to change his soaking clothes.

He was ambushed by a gang of up to eight who then escaped on bicycles.

Freddy is one of the latest teenagers killed violently in the capital

On Saturday a 27-year-old man was stabbed to death after leaving a house party in north London.

Elliot Guy was attacked in Tufnell Park after an argument at a party in Junction Road.

He died later in Whittington Hospital.

Mr Guy became a father just two months ago.

Half of knife crime among children in London is committed by black youths, a highly sensitive Scotland Yard report claims.

The confidential figures showed that 124 of the 225 under-18s legally  'proceeded-against' for knife offences in the past three months are black.

However, 222 of the 345 young people attacked or threatened with a knife since 1 April in cases where ethnicity was logged were white.

In the same sample, 61 were black.

The figures are the first comprehensive breakdown of knife crime and race in London.