As the cat would, he valued the time he spent learning the movements, habits and styles of the target. If any man or woman in the cafe he passed, the launderette, the small gaming arcade or the kebab restaurant had seen him and noticed him, then let their eyes fasten on the back of the target ahead, a similar image might have locked in their minds: hunter and hunted in the tight alleyways between the blocks, where the bins were stored and the vermin found food. A cat did not hurry when it stalked prey. It attacked on its own terms and at the time of its choosing. Before it surged forward, it would feign indifference to a scurrying rat. He might have been seen, but he was not noticed, and that was a skill he shared with the cat, the killer.

The man in front of him had come out of a good-sized house, four bedrooms and a brick-paved driveway to a double garage, had turned in the doorway and kissed the face of a woman in a silky robe. He had used a code at the gatepost to pass through electronically controlled gates, then walked briskly up the pavement and past the first tower block. He had gone into a newsagent to buy a tabloid, some chewing gum and a plastic bottle of milk, then had stopped at a cafe to linger for ten minutes over a pot of tea. Now he was on the move again, going back to the house.

The cat on the street was Robbie Cairns. He knew that the rat he stalked was Johnny ‘Cross Lamps’ Wilson. The name was of little importance to him. He assumed that the nickname related to an eye problem. Before that morning he had had little idea of what Johnny ‘Cross Lamps’ Wilson would look like. He had not been given a photograph – never had been since he’d started out in his line of work – or a description other than that the man was balding and wore big spectacles, but he had been provided with the address. Didn’t need much else, except a sense of the location and any personal security the target kept around him. Robbie Cairns had not seen an escort. On familiar ground, where he ruled and was respected, Johnny ‘Cross Lamps’ Wilson would not have reckoned he needed one. Different if he was on a stranger’s ground.