Emergency services are said to be working on a policeman who was stabbed by an attacker, who was shot by a security officer.
Up to 12 people are said to be injured on Westminster Bridge after a jeep mounted the footpath and ploughed into them, many are said to be cyclists.
It’s said that the same vehicle proceeded down to Parliament Square and smashed into the railings before jumping out, attacking the policeman with a knife and then subsequently being shot.
There’s at least 15 ambulances at the scene.
This story is developing.