Heading straight for him.

An explosion: bricks flying from the factory’s front wall.

Rebus dropped the handset, got his arm stuck in the seatbelt. Clarke was screaming as he leaped clear.

A second later, truck and car connected in a rending of metal and smashing of glass. Domino effect: Clarke’s car hit the one behind, throwing officers off balance. The road was like a skating rink, the truck pushing one car, two cars, then three cars back on to the highway.

Claverhouse was on the megaphone, choking on dust: ‘No shooting! Officers too close! Officers too close!’ Yes, all they needed now was to be pinned down by sniper fire. Men and women were slipping, losing their footing, clambering from their cars. Some of them armed, but dazed. The truck’s back doors, buckled by the initial collision, flew open, seven or eight men hit the ground running. Two of them had handguns, and loosed off three or four shots apiece.

Shouts, screams, the’ megaphone. The glass wall of the gatehouse exploded as a bullet hit it. Rebus couldn’t see Jack Morton ... couldn’t see Siobhan. He was lying on his front on a section of grass verge, hands over his head: classic defence/defeat posture and bloody useless with it. The whole area was picked out by floodlights, and one of the gunmen - Declan from the shop - was now aiming at those. Other members of the gang had headed out into the street and were running for it. They carried shotguns, pickaxe handles. Rebus recognised a few more faces: Ally Cornwell, Deek McGrain. The streetlights were dead, of course, giving them all the cover they could want. Rebus hoped the backup cars from the builder’s yard were coming.

Yes: turning the corner now, all lights blazing, sirens howling. Tenement curtains were twitching, palms rubbing at windows. And right in front of Rebus, about an inch from his nose, a thickly rimed blade of grass. He could make out each sliver of frost, and the complex patterns which had formed. But he realised it was melting fast as his breath hit it. And his front was growing cold. And the marksmen were running from the building, lit up like a firing-range.

And Siobhan Clarke was safe: he could see her lying beneath a car. Good girl.

And one policewoman, also lying low, had been wounded in the knee. She kept touching it with her hand, then pulling the hand away to stare at the blood.

And there was still no sign of Jack Morton.

The gunmen were returning fire, scattering shots, smashing windscreens. Uniforms were ordered out of the front backup car. Four of the gang got in.

Second car: uniforms out, three of the gang got in. No windscreens, but they were rolling. Yelling and whooping, waving their weapons. The two remaining gunmen were cool. They were taking a good look round, assessing the situation. Did they want to be here when the marksmen arrived? Maybe they did. Maybe they fancied their chances in that arena, too. Their luck had held this far, after all. Claverhouse: the less luck’s involved, the better I’ll like it.