Rioting has spread across London on a third night of violence, with unrest flaring in other English cities.

An extra 1,700 police officers were deployed in London, where shops were looted and buildings were set alight.

Birmingham, Liverpool, Nottingham and Bristol also saw violence.

Speaking to BBC Breakfast, Theresa May would not be drawn on the option of calling in the army, saying that the UK is policed "by consent".

The home secretary said that unrest needed to stop, but cited "robust policing and good use of intelligence" as the means to this end.