Gun and knife victims

February 3: James Smartt-Ford, 16, was gunned down in front of hundreds of people at Streatham ice area in south London. Photograph: Metropolitan Police/PA

February 6: Regular churchgoer Michael Dosunmu, 15, from Peckham, south London, was shot in his bedroom. Photograph: Metropolitan Police/Getty

February 14: Billy Cox, 15, was shot dead on the doorstep of his home in Clapham, south London. Photograph: Metropolitan Police/Getty

March 14: Kodjo Yenga, 16, died from a single stab wound to the heart in Hammersmith, west London. Photograph: Metropolitan Police/PA

March 17: Adam Regis, 15, the nephew of the Olympic sprinter John Regis, was stabbed in Plaistow, east London, on his way home from the cinema. Photograph: Metropolitan Police/PA

April 6: Paul Erhahon, 14, was stabbed to death the foyer of a block of flats in Leytonstone, east London. Photograph: Metropolitan Police/PA

June 23: Annaka Keniesha Pinto, 17, from Tottenham, south London, was shot during a fight in a bar. Photograph: Metropolitan Police/PA

23 June: Ben Hitchcock, 16, was stabbed in the stomach when a fight broke out over gatecrashers at a party in Beckenham, south London. Photograph: Metropolitan Police/PA

June 26: Martin Dinnegan, 14, was stabbed to death in Islington, north London, after being pursued by a group of up to 20 youngsters. Photograph: Metropolitan Police/PA

July 26: Abukar Mahamud, 16, was killed by a single gunshot wound to the neck after being chased by youths on bikes in Stockwell, south London. Photograph: Metropolitan Police/PA