The Prospect office is two minutes from parliament and in the immediate aftermath of today’s suspected terror attack I was standing in the square watching police and paramedics crowding round a body on the floor by the foot of Big Ben. A few yards away from them was a car, parked horizontally across the pavement. The body was covered in a silver blanket, the kind Marathon runners get at the finish line. It was not moving.
A helicopter suddenly appeared, very low over the square, and police officers began to shoo the crowds away from what had now become a landing site. The chopper circled a few times and then set down on the grass at the end of the square closest to the entrance to parliament. An ambulance was parked inside the gates used by MPs.