Var knew that Ricard’s men would eventually get through. They would first use the least force possible to breach the door’s seal, in the hope that, once pressures were equalized, they could just open it manually. Probably ceramic bullets would be fired at an angle through the bubblemetal, to reduce the chances of them hitting the reactor. They wouldn’t want to risk major damage here but, on finding the door firmly jammed, they would have to use something more substantial – probably a grenade. This would hopefully take them the extra vital minutes that Var needed.

‘They’re coming,’ she warned, now watching on her laptop screen as a crawler headed over from Hex One and entered the pool of light cast by the exterior lights of Hex Three.

Carol looked round, her face white.

‘You done there yet?’ Var called up to Lopomac as a haze of releasing fluid drifted down from where he had positioned himself, hanging directly underneath the hatch on a rope strung between two pitons.

‘It should open,’ he declared, now dropping a coil of rope attached to one of the array of pitons he had driven into the bonded regolith surrounding the hatch. ‘The motors are receiving power and the hydraulics don’t seem jammed.’

‘Okay Carol,’ said Var, waving her towards the rope.

Carol headed over, pulling on her suit helmet, already wearing her harness and electric climbing motor. Var pulled on her own harness then donned her helmet, Bluetoothing the laptop to her visor display before closing it and putting it into her hip pouch. Carol ascended to the hatch along with Lopomac, who had moved to another section of rope, and positioned herself just below the seam of the double-door hatch. Var walked across, undid the clamps holding the ladder in place, released its telescopic lock and collapsed it. She carried it over to jam it against the bulkhead door too, so that an enforcer spotting a telescopic ladder in here would assume its purpose was to add to the obstacles preventing him and his fellows getting in. Returning to the rope, she attached her own climbing motor, engaged the friction wheels and set the motor running. In a moment she was up beside Lopomac, on the opposite side of the hatch from Carol, and also just below the seam.

‘Remember,’ Var urged, ‘stay low. The dust baffles up there around the edge, as well as the external lights, should keep us concealed from any snipers Ricard leaves outside.’

‘If he does leave any snipers outside,’ said Lopomac.