Shepherd watched Tom and Moira walk away with Liam. He knew that his place was with his son, being a father. But the adrenaline kicked in and his heart beat faster. He wanted to be a father, but he wanted to see Carpenter pay for what he’d done. Carpenter had kidnapped Liam and threatened to kill him. He’d forced Shepherd to help him escape. And he’d ordered the killing of Jonathon Elliott. Carpenter had to pay for his crimes, because if he was allowed to get away with them then everything Shepherd had done would count for nothing.

‘Yes,’ said Shepherd. ‘Yes, I do.’

It was a vision from Hell, Shepherd thought. Black figures with protruding snouts, huge eyes, and massive humps on their backs, crouching by the walls, bathed in red light. Their chests rose and fell as they pulled air into their lungs through tubes that ran up to the roof. The troopers were all bent forward, not wanting their parachutes to rub against the fuselage of the Nimrod. They were cradling their Heckler & Koch submachine-guns, barrels pointing down. They were all kitted out with full high-altitude parachute life-support system equipment. All the men wore black balaclavas and helmets, oxygen masks, bottles and carriers, boots and insulated over-boots. They wore felt gloves close to the skin for insulation and leather ones for protection, goggles to protect the eyes from the icy wind. Strapped to their chests were the LCDs of their computerised navigation systems. Their black thermal suits had felt liners to protect them against the high-altitude sub-zero temperatures. A thermometer on the fuselage of the Nimrod gave the temperature as minus 48 degrees Fahrenheit, and once they jumped, the wind-chill factor would kick in. Without the protective clothing they’d be blocks of ice by the time they reached the target.

On their backs were parachute canopies, two-thirds larger than a standard sports parachute, attached to a standard army harness, with a smaller reserve chute at the front of the rig. They had handguns in holsters and knives strapped to their legs. The submachine-guns were on webbing harnesses. All the troopers had the Heckler & Koch MP5SD4, a silenced model with a three-round burst facility in addition to single and full automatic fire. It had no butt stock so it was less likely to get tangled in the parachute rigging, and the silencer meant they’d have the element of surprise. They had extra ammunition in pouches on their webbing belts. Everything, in fact, that the trooper about town needed to drop in from thirty thousand feet and kill people.

They’d all been weighed at the Royal Navy Air Station in Culdrose and equipment had been distributed to equalise the men’s weights. The time taken for a high-altitude high-opening jump was dependent on weight. The heavier the man and his equipment, the quicker he’d descend, and for what Gannon had in mind it was vital they landed together.