London riots: Cash tills found as more than 900 charged
Two cash tills believed to have been taken from a north London shop during the recent disorder were among items recovered by police during raids.
The Metropolitan Police said it had found the tills, knives and a sat-nav on the Denton Estate in Camden.
More than 1,600 people have been arrested and 940 charged over the riots which began on 6 August in Tottenham.
London Mayor Boris Johnson said youths convicted of rioting will lose their benefit of free travel.
More than 330 of those arrested in connection with violence, disorder and looting are under the age of 18.
Mr Johnson said: "We want to look at all sorts of ways so that young people who have been involved in rioting and looting do not simply walk and wave two fingers to the authorities and say, 'well I enjoyed all that' or take it as a badge of honour.
"Those in London who have the benefit of free travel will obviously have the right removed as a result of being involved, but they can earn it back if they do good in their communities.
"That will be quite a burdensome and laborious process."
The mayor also called for courts to send children, aged between 11 and 15, who are convicted of riot offences to be sent to pupil referral units.
Currently only head teachers of schools have the power to do that.
Work and Pensions Secretary Iain Duncan Smith said he was considering stripping benefits for those convicted but not jailed for rioting.
Last week, Prime Minister David Cameron called for people who "loot and pillage their own community" to be evicted from council houses.
On Saturday, during the search of the Denton Estate and Queens Crescent, officers from Camden also found a total of 14 knives, metal chains, crowbars, some cannabis, car keys, a mobile phone and a CS gas canister.
The cash registers recovered during the raids were looted from Evans Cycle Shop in Chalk Farm Road during the disturbance on the night of 8 August, police said.
Det Ch Insp Eric Phelps said the knives seized during the search "could have been used as lethal weapons".
Officers used metal detectors, and dug up flower beds and part of the grounds, during the 10-hour-long search in Camden.
A Bulgari ring was also recovered from Powis Terrace during a search in the Notting Hill area, west London, on Sunday.
The designer ring possibly belongs to a guest who was dining at the Bumpkin restaurant or the Walmer Castle pub, which were targeted during the disorder, police said.
A street tea party will be held in the evening in Hackney, east London, to lift the spirits of residents following rioting and looting which hit the area last Monday.
The party has been organised by St John Church, which is close to Mare Street where the rioting broke out on Monday evening before spreading to other areas in south, east and north London.
The event is backed by local businesses and the council.
Kim Wright, Hackney Council's corporate director for health and community services, said: "The feeling on the streets here very much is about turning this [the riots] into something positive and making this the focus of communities getting even closer together than they have been in the past."