Keeping guns off London's streets in the wake of terrorism

The Metropolitan Police has said "we will do all we can to stop terrorists getting hold of guns" in the wake of the Paris attacks.

Most guns in London are held by criminal gangs, but there are concerns extremists are looking to arm themselves with the most powerful of weapons.

BBC London's Home Affairs Correspondent Nick Beake spoke to Det Ch Supt Jo Chilton, head of the National Ballistics Intelligence Service, Assistant Commissioner Neil Basu from the UK Counter-Terrorism Policing Network and Martin Parker from the National Ballistics Intelligence Service.