A flat aluminium box twenty centimetres thick and about a quarter of a metre square, the belly-pack clicked straight into the suit, with bayonet fittings on its back. At once the suit’s software began running diagnostics, displayed in the visor. Next all he had to do was unplug his suit’s air-hose from the chair arm and insert it into its socket in the side of the box, and after a moment the display indicated its readiness – confirming he had ten hours of air. Then he turned to where two of Malden’s troops were opening the inner hatch of the airlock.

Those two went through first, dragging a couple of large cylindrical objects with them. Immediately after them, another four went through, then another four – each set of four attaching their belts to a combined safety- and optic-link line, then cramming themselves into the airlock. Malden beckoned Saul and Hannah to follow himself and Braddock, and they comprised the next four through, the line connecting them all and providing a communications link, but only between the four of them.

As the pressure in the airlock dropped to zero, their suits expanded slightly, stiffened and carried out further auto-diagnostics. Braddock exited first, the line between him and Hannah drawing taut until she followed. Saul pushed out next, with Malden behind – a cautious positioning on the line that reminded Saul that he was not fully trusted. Once outside, he could see how the massive length of the space plane was jammed into a network of distorted or snapped bubblemetal beams. Towards its rear, about the rocket-motor output, something like heat haze shimmered, but everything else stood out in sharp-edged clarity – with no atmosphere to distort the view.

Ahead, the two other groups of four were already moving off, widely spaced, and beyond them he saw how the first pair of soldiers had joined together those two cylindrical objects to create a single cylinder about the size of a coffin. He had assumed they would all be attached to the same line, for safety’s sake, but then understood why not. If they were fired upon out here, it wouldn’t be a good idea for them all to be bunched together.

‘Let’s go,’ said Malden, his voice now sounding clear through the optic connection.

Braddock used a reaction jet, fired from his forearm, snapping the line taut and towing them after the others. Glancing back, Saul saw the next four on their way out, but then returned his focus to their immediate surroundings.