Boris Johnson says he still wants to be blasted by water cannon to demonstrate the weapon poses no risk to the public.
Boris Johnson and Metropolitan Police Commissioner Sir Bernard Hogan-Howe said the weapons were being converted for use on London's streets.
Carol Howard who a won bullying case against Scotland Yard is on bail after being arrested on suspicion of assault.
A scout leader accused of allegedly downloading images of child abuse has been found dead in north-west London. Nick Dewdney's body was discovered by police at the Colindale home last Saturday. His death is not being treated as suspicious.
The 50-year-old was suspended by the Scout Association after he was arrested on suspicion of downloading indecent images of children in April.
The Scout Association says it carries out stringent vetting of all adults who work with young people. "We require our volunteers to work to a strict code of practice outlined in the Young People First Code of Practice."
Police are appealing for help to find a man who went missing from Kings College Hospital, Camberwell on Friday. 29-year-old Charlie O'Connell was last seen at the hospital after attending a mental health assessment.
He is known to frequent Camden and Highgate. At the time of his disappearance he was wearing a blue baseball cap, white t-shirt and blue denim shorts.
Police are advising anyone who sees Charlie O'Connell not to approach him, but to contact police.
Five men are still being questioned by police following a raid at an exclusive designer shop in Knightsbridge. A gang burst into the Louis Vuitton store in the early hours of yesterday morning, making off with a number of handbags. Police say some of the goods have been recovered.
Three men have been arrested after a laser pen was shone directly at the Metropolitan Police helicopter.
The helicopter was targeted by the laser last night. Officers later found the laser pen on the ground at Centre Street, Bethnal Green. Two 19 year-old men and a 20 year-old man were arrested and are being held in police custody.
Police are asking for the public's help finding a missing 81-year-old man from Haringey. Daniel Donovan was last seen this afternoon at a bookshop near Victoria Station.
Four hundred and fifty four people have been arrested today, as part of a Met campaign to drive down knife crime in the capital. Dozens of coordinated raids took place, with police also dredging a pond in Barnet in search of weapons.
A 15-year-old boy was arrested today after police found a knife hidden in his pants. The teenager was held by officers as part of a co-ordinated day of action targeting knife crime across the capital.
He was detained by police in Islington during 'Operation Big Wing' involving more than 5,800 officers from London’s 32 boroughs.
Tackling weapon-related violence is a priority for the Met. Operations continually take place throughout the Met - focusing on key times and places where intelligence points to the highest risk.
We proactively target known violent offenders, stopping and searching people to detect and deter the carrying of weapons and to deploy screening arches in locations such as transport hubs.
– Detective Chief Superintendent Gordon Allison, Head of Trident
However we cannot rely on enforcement as the only tool. We work with schools and this engagement forms a very important part of our prevention work. We work closely with some fantastic programmes and groups such as Growing Against Gangs and Violence and speak to children of all ages.
Police are appealing to the public to trace a man following a serious assault in Brentford.
Amish Kansagra is Asian, 5 feet 9 inches tall with short black hair and a goatee beard. He sometimes wears glasses.
Detectives want to speak to the 28-year-old - who frequents Hounslow, Ealing and Brent - after a woman was found seriously hurt on Sunday.
The 35-year-old was taken to a west London hospital where she's now in a stable condition.
Officers believe the two are known to each other.
A man who went missing from a mental health unit in Homerton in East London has been arrested.
Anthony Knowles had been on escorted leave when he disappeared on Saturday.
Police had warned the public not to approach the 48-year-old. Scotland Yard said that he was detained at an address in Hackney.
The Metropolitan Police are deploying more than 500 officers at key junctions across the capital during a two week operation to promote road safety. As part of the operation they will focus on younger drivers and those who will be staying up to watch World Cup matches.
Additional policing activity will include a series of events that allow people to sit in the driver's seat of a HGV get a better understanding of what the driver can and can't see, especially in regards to cyclists on the nearside and directly in front of the vehicle.