Croke put on a yellow police bib before climbing into the front of the security truck. ‘Another quiet night in, eh, boss?’ said Manfredo, already at the wheel.
‘Another quiet night in.’
Morgenstern was on the cathedral steps. He’d be staying behind to supervise the re-plugging of the crypt floor before taking a chopper to USAF Lakenheath to meet the convoy. Croke waved to let him know they were ready, and to thank him for his help. Morgenstern relayed the signal to the driver of the nuclear container. Its lights came on. Its engine started to rumble. It began slowly to move, nudging its nose like a curious dog against the parting curtains of the canvas canopy then slipping out between them.
The security truck followed immediately behind. The sun had set, and they were greeted by a dazzling wildfire of camera flashes that made Croke blink despite their tinted windscreen. The first eruption died away; it grew diffuse. The spotlights of TV helicopters tracked them as a police escort formed around them. Blue lights flashed in synchrony as they forced a path through the crowds to Ludgate Hill, and sirens suddenly began to blare in a hideous concerted screech of noise. They picked up speed, though not too much. They were, after all, supposed to be carrying a dirty bomb.
All the feeder roads had been closed off by the police, so that there was no traffic to negotiate, no need to wait for lights. They reached the Limehouse Link and plunged down into its mouth. The white-tiled walls and compressed space reflected their sirens and lights, like some devilish nightclub. The tunnel was a mile long, with lay-bys for breakdowns every hundred yards or so. Two nondescript vans were waiting in the first. Manfredo braked sharply to drop off the back of the convoy and pull in beside them. A second security truck, indistinguishable from their own, was parked in the next lay-by along. It began to pull out the moment the last police outrider had passed, then accelerated to catch up with the convoy before it left the tunnel. In the nocturnal gloom, surrounded by this riot of noise and light, it would take a freakishly smart-eyed observer to notice the switch.
Croke opened the passenger door, jumped down, went around back. Working together, they all heaved the two smaller chests into the first van; the larger, along with Luke and Rachel, into the second. They locked up the security truck, covered it with a blue tarpaulin, then they divided into the two vans, Manfredo and Kieran taking the respective wheels. They drove on a short distance and pulled into another lay-by halfway along the tunnel. Then they waited.
It was another five minutes before the police opened their roadblocks and the first few headlights appeared in their rear-views. Manfredo and Kieran now pulled out well ahead of them, emerging unheralded and unobserved from the eastern mouth of the tunnel a minute later, before proceeding in a far more discreet convoy to City Airport.