Jonathon turned to follow her gaze. As he moved, the gun kicked, the window exploded and cubes of glass splattered across Trish’s face.

The explosion was so loud that it deafened her and she felt rather than heard the next two shots. Her face was wet and she thought she’d been cut, but then she realised it wasn’t her blood: her face and chest were soaked with her husband’s and she screamed as he toppled forward on to the steering wheel.

There were eight of them in the minibus, all wearing blue overalls, training shoes and baseball caps with the logo of the pest-control company above the peak. As the minibus stopped at the gate a bored security guard with a clipboard waited until the driver wound down the window, then peered at the plastic ID card clipped to his overall pocket. He did a head count and made a note.

‘No one off sick tonight, then?’ On a bad night there’d only be four in the squad. Eight was a full complement and, with the company barely paying above minimum wage, they were usually at least one man short. No women. The work was unpleasant and physically demanding, and while sex-discrimination laws meant that women couldn’t be refused a job, few made it beyond the first night.

‘New blood,’ said the driver. ‘Still keen.’

The security guard shrugged. ‘Yeah, I remember keen,’ he said wearily. He was in his late twenties but looked older, with hair greying at the temples and a spreading waistline. ‘Okay, gentlemen, hold your ID cards where I can see them, please.’

The men did as they were asked and the security guard shone his torch at the cards one by one. He was too far away to check that the faces of the men matched those on the cards, but even if he had studied them he would have seen nothing wrong. Time had been taken to ensure that the ID cards were faultless. The van was genuine, as were the overalls and baseball caps, but its original occupants were in their underwear in a disused factory in east London, gagged, bound and guarded by another member of the gang. He would stay with them until he was told that the job was done.

The faces that looked back at the security guard showed the bored resignation of men about to start eight hours of tedious night work. Three were West Indian, including the driver. The rest were white, all aged under forty. One of the youngest yawned, showing a mouthful of bad teeth.