A girl looks at damage caused by looters in a pawn shop on Clapham High Street on August 8, 2011 in London, England. Sporadic looting and clashes with police continue for a third day in parts of the capital after the killing of Mark Duggan, 29, by armed police in an attempted arrest on August 4. (Chris Jackson/Getty Images)

Firefighters battle a large fire that broke out in shops and residential properties in Croydon on August 9, 2011 in London, England. Sporadic looting and clashes with police continue for a third day in parts of the capital after the killing of Mark Duggan, 29, by armed police in an attempted arrest on August 4. (Dan Kitwood/Getty Images)

Residents watch as a large fire engulfs shops and residential properties in Croydon on August 9, 2011 in London, England. Sporadic looting and clashes with police continue for a third day in parts of the capital after the killing of Mark Duggan, 29, by armed police in an attempted arrest on August 4. (Dan Kitwood/Getty Images)

Residents watch as a large fire engulfs shops and residential properties in Croydon on August 9, 2011 in London, England. Sporadic looting and clashes with police continue for a third day in parts of the capital. (Dan Kitwood/Getty Images)

Police officers patrol the streets as a large fire engulfs shops and residential properties in Croydon on August 9, 2011 in London, England. Sporadic looting and clashes with police continue for a third day in parts of the capital. (Dan Kitwood/Getty Images)

Firefighters battle a large fire that broke out in shops and residential properties in Croydon on August 9, 2011 in London, England. Sporadic looting and clashes with police continue for a third day in parts of the capital. (Dan Kitwood/Getty Images)

A chair is left embedded in a restaurant window in Haven Green following a night of rioting in Ealing on August 9, 2011 in London, England. Sporadic looting, arson and clashes with police continued for a third day in parts of the capital, as well as in Liverpool, Birmingham and Bristol. (Jim Dyson/Getty Images)

Volunteers get ready to clean up after Monday night's rioting at Clapham Junction on August 9, 2011 in London, England. Sporadic looting and clashes with police continue for a third day in parts of the capital after the killing of Mark Duggan, 29, by armed police in an attempted arrest on August 4. (Chris Jackson/Getty Images)

People eager to clean up after Monday night's rioting gather at Clapham Junction on August 9, 2011 in London, England. (Chris Jackson/Getty Images)

London Mayor Boris Johnson stands with Police Superintendent Jo Oakley near burnt-out Reeves Corner furniture store on August 9, 2011 in Croydon, England. Emergency services have been cleaning up after a third night of rioting in and around London and other areas of England. (Peter Macdiarmid/Getty Images)

A police officer pushes the media back during a police charge in Hackney, north London on August 8, 2011. Now in it's third night of unrest, London has seen sporadic outbreaks of looting and clashes both north and south of the river Thames. Two police cars and a large number of buildings were set ablaze in Tottenham, north London, on Saturday, following a protest over the fatal shooting of a 29-year-old man in an armed stand-off with officers. The patrol cars were torched as dozens gathered outside the police station on the High Road in Tottenham. (LEON NEAL/AFP/Getty Images)

An injured man is led to an ambulance in handcuffs after being removed from a branch of Currys electrical retailer in Clapham Junction, south London on August 8, 2011. London has seen sporadic outbreaks of looting and clashes both north and south of the river Thames. (LEON NEAL/AFP/Getty Images)

British riot police arrive in front of a burning building in Croydon, South London on August 8, 2011. (CARL DE SOUZA/AFP/Getty Images)

Damage is pictured to a local shop in Croydon, south of London, on August 9, 2011, following a third night of violence on the streets of London. Violence escalated across London and at least three other cities Tuesday as police fought thousands of rioters and looters and Prime Minister David Cameron headed back to Britain to face the crisis. (Andrew Cowie/AFP/Getty Images)

A policeman walks past the charred remains of the Reeves furniture store in Croydon, south of London, on August 9, 2011, following a third night of violence on the streets of London. Violence escalated across London and at least three other cities Tuesday as police fought thousands of rioters and looters and Prime Minister David Cameron headed back to Britain to face the crisis. (Andrew Cowie/AFP/Getty Images)

Mayor of London, Boris Johnson (C) addresses members of the public in Clapham Junction, in south London, on August 9, 2011, following a third night of unrest in London. Smouldering parts of London resembled a war zone on Tuesday with shops looted, century-old businesses burned to the ground and streets littered with barricades. (PAUL ELLIS/AFP/Getty Images)

Firefighters douse buildings set ablaze by rioters in Clapham Junction, in south London, on August 9, 2011, following a third night of unrest in London. Smouldering parts of London resembled a war zone on Tuesday with shops looted, century-old businesses burned to the ground and streets littered with barricades. (PAUL ELLIS/AFP/Getty Images)

Members of the public show their brushes to Mayor of London, Boris Johnson, on August 9, 2011, as they prepare to clean their streets in Clapham Junction, south London, of debris following a third night of unrest (PAUL ELLIS/AFP/Getty Images)

A street cleaner sweeps up around a smouldering van set alight during riots in Hackney in London August 9, 2011. Prime Minister David Cameron was to hold crisis talks on Tuesday after three nights of riots, looting and arson by masked, hooded youths that wrecked shopping centres in many parts of London and spread to three other cities. REUTERS/Luke MacGregor

A man walks past burned-out cars set alight during riots in Hackney in London August 9, 2011. Prime Minister David Cameron was to hold crisis talks on Tuesday after three nights of riots, looting and arson by masked, hooded youths that wrecked shopping centres in many parts of London and spread to three other cities. REUTERS/Luke MacGregor

A publican boards up his pub in central London August 9, 2011. Thousands of policemen prepared to deploy on London's streets on Tuesday night to head off rioters and looters who have rampaged through parts of the British capital virtually unchecked for the past three nights. REUTERS/Dylan Martinez

Volunteers wave brooms as they wait to clear-up after overnight disturbances in Clapham Junction, in south London August 9, 2011. British Prime Minister David Cameron said he would recall parliament from its summer recess for a day on Thursday after rioting swept through London for three consecutive nights. REUTERS/Stefan Wermuth

London Mayor Boris Johnson speaks to people in Clapham Junction, in south London, August 9, 2011. British Prime Minister David Cameron said he would recall parliament from its summer recess for a day on Thursday after rioting swept through London for three consecutive nights. REUTERS/Stefan Wermuth

A council worker clears the remains of destroyed vehicles in Hackney, north London August 9, 2011. British Prime Minister David Cameron said he would recall parliament from its summer recess for a day on Thursday after rioting swept through London for three consecutive nights. REUTERS/Chris Helgren

Smoke billows from a Sony Centre warehouse in Enfield, north London in this still image taken from footage, August 9, 2011. Thousands of policemen prepared to deploy on London's streets on Tuesday night to head off rioters and looters who have rampaged through parts of the British capital virtually unchecked for the past three nights. REUTERS/BBC/ITN Helicopter via Reuters TV REUTERS/BBC/ITN Helicopter via Reuters TV

A man clears up in a supermarket in Ealing in west London, August 9, 2011. Prime Minister David Cameron will hold crisis talks on Tuesday after three nights of riots, looting and arson by masked, hooded youths, that wrecked shopping centres in many parts of London and spread to other cities. ille REUTERS/Toby Melv

Riot police charge past burning buildings on a residential street in Croydon, south London, August 8, 2011. Rioting and looting spread across London on Monday as hooded youths set buildings and cars ablaze, smashed shop windows and hurled bottles and stones at police in a third night of violence in Britain's worst unrest in decades. REUTERS/Dylan Martinez

Riot policeman charge past burning buildings in Croydon, south London August 8, 2011. REUTERS/Dylan Martinez

A looter jumps out from a smashed-up department store in Peckham, south London August 8, 2011. REUTERS/Dylan Martinez