5.30pm
The journalists who were in the press gallery are now being held in Westminster Hall. Armed police seem to be search the Palace of Westminster room by room - quite an undertaking, because it’s a rabbit warren, with endless cellars, cubby holes etc - and I’ve just seen a team go into the room where the Westminster Hall chamber is, guns raised as if they were on the alert. We’re told that they believe there may still be one suspect on the loose.