Police Constable Kevin Long crouched low in the bushes beside the bend in the road. He was beginning to sweat profusely and flies buzzed around his head. His knees ached. He was having great difficulty operating the “speeding gun” he had been told to use. “Look, lad,” the Sergeant had said, “this morning I want you to go to the Staples Row crossroads. You know where I mean. There’s a sharp bend in the B85 to the north before the crossroads. Four or five notices telling people to slow down to thirty both beside and on the road, but nobody…