He’d spoken too soon. Half a mile on, they ran into a convoy of very slow trucks. They were behind a canvas-covered four-by-four that he couldn’t see around at all, and it was slowing down till it was scarcely crawling. “Can you see what’s causing the problem?” Ernest asked Cess.

“No,” Cess said, rolling down his window and leaning out. “We’re coming into a village. Burmarsh, I think.” The behemoth ahead slowed to a stop between a church and a pub, with no room to squeeze past on either side.

Cess leaned out again and then got out and walked past the truck to see. “It looks rather bad,” he reported, getting back in the car. “There are vehicles and tanks and artillery as far as one can see, and it doesn’t look as though they’ll move any time soon. Some of them are sitting on the bonnets of their lorries, drinking tea and eating sandwiches.”

“We’ll have to go back the way we came,” Ernest said. Cess nodded and reached for the map. Ernest put in the clutch and tried to shift it into reverse. It ground and then jammed.

A movement from in front of the car made him glance up. An American MP was walking toward them.

Jesus. He was bound to ask them where they were going. Ernest jiggled the gear stick, trying to work it back into gear, but it wouldn’t budge. “Cess,” Ernest said, glancing quickly in the mirror. Hopefully the colonel had fallen asleep again. No, he was awake and watching interestedly.

“Cess, roll up your window before the colonel catches a chill,” Ernest said. “Cess!”

“Hmm?” Cess said from behind the map.

The MP was nearly even with the car. Ernest yanked on the gear stick, trying to force it into gear, any gear. “Roll up the goddamned window. Cess!”

“What?” Cess said, and finally looked up, but too late. The MP was even with the window. Cess shot Ernest a look of panic. “There’s a soldier—”

“I see him,” Ernest said grimly and gave the gear stick one last desperate yank. It slid into reverse, and he let out the clutch. And killed the motor.

The MP leaned in. “You can’t get through this way, sir. The road ahead’s full of troops and equipment. You’ll have to go back the way you came.”

“Right,” Ernest said, restarting the car. “Sorry.”

“Where were you trying to go, sir?”

Don’t say Portsmouth, Ernest ordered Cess silently. Or Dover. “Bunbury,” Cess said.

“We’ll be out of your way in a moment, Corporal,” Ernest said, and put the car in gear. He laid his arm on the back of the seat and looked back to see a half-track pull up behind them.

“Bunbury, sir?” the MP repeated. “Do you mean Banbury?”

Which was close to Bletchley Park. Ernest leaned across Cess. “We’re blocked in, I’m afraid. Can you ask the vehicle behind us to move?”

The MP nodded, but the half-track’s driver had already taken matters into his own hands and pulled up beside them on the driver’s side, with inches to spare.