A double decker bus burns as riot police try to contain a large group of people on a main road in Tottenham, north London on 6 August 2011. Two police cars were on Saturday set ablaze in north London 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.AFP PHOTO/LEON NEAL

A double decker bus burns as riot police try to contain a large group of people on a main road in Tottenham, north London on August 6, 2011. Two police cars were on Saturday set ablaze in north London 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. AFP PHOTO/LEON NEAL

A double decker bus burns as riot police try to contain a large group of people on a main road in Tottenham, north London on 6 August 2011. Two police cars were on Saturday set ablaze in north London 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. AFP PHOTO / LEON NEAL

A shop and police car burn as riot police try to contain a large group of people on a main road in Tottenham, north London on August 6, 2011. Two police cars were on Saturday set ablaze in north London 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. AFP PHOTO/LEON NEAL

A shop and police car burn as riot police try to contain a large group of people on a main road in Tottenham, north London on August 6, 2011. Two police cars were on Saturday set ablaze in north London 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. AFP PHOTO/LEON NEAL

A shop burns as riot police try to contain a large group of people on a main road in Tottenham, north London on August 6 2011. Two police cars were on Saturday set ablaze in north London 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. AFP PHOTO/LEON NEAL

A shop burns as riot police try to contain a large group of people on a main road in Tottenham, north London on 6 August 2011. Two police cars were on Saturday set ablaze in north London 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.AFP PHOTO/LEON NEAL

A burnt-out police car lays in the street as riot police try to contain a large group of people on a main road in Tottenham, north London on August 6 2011. Two police cars were on Saturday set ablaze in north London 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.AFP PHOTO/LEON NEAL

A woman walks through the debris with two children as riot police try to contain a large group of people on a main road in Tottenham, north London on August 6 2011. Two police cars were on Saturday set ablaze in north London 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. AFP PHOTO/LEON NEAL

A woman walks through the debris with two children as riot police try to contain a large group of people on a main road in Tottenham, north London on August 6, 2011. Two police cars were on Saturday set ablaze in north London 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. AFP PHOTO/LEON NEAL