Prime Minister chairs meeting of Cobra committee
Prime Minister Theresa May chaired a meeting of the Government's emergency Cobra committee on Wednesday evening to discuss the immediate response to the incident at the Palace of Westminster.
The Cobra committee brings together government ministers with senior officials of the emergency services and security and intelligence agencies.
Meeting in a briefing room of the Cabinet Office on Whitehall, Cobra co-ordinates the high-level response to serious incidents, and has previously gathered after terrorist atrocities including the July 7 attacks on the London transport network and the murder of soldier Lee Rigby.