Except that it was impossible to maintain. There were too few pedestrians. He felt compelled to look at them, commit the cardinal sin of making eye contact for a brief moment as they passed. Everyone had the same expression, one that showed that deep down, no matter their bluff, they were afraid.

Petrovitch could only assume that his eyes held that same fear.

He crossed the road, walking at a diagonal. In all his years in the Metrozone, he’d never done such a thing. He passed darkened shops that he couldn’t remember ever closing. Their signs were illuminated, but inside was gray gloom.

He turned out of Exhibition Road, turned right. Across, on the other side, was Hyde Park, just as still as it had been yesterday. Yet today, it wasn’t the stillness of death that emanated from the miasma. It was the silence of a held breath.

It wasn’t only the city that was waiting for something to happen. Petrovitch pushed his hands up inside his T-shirt sleeves, and hurried along to Hyde Park corner.

Marchenkho wasn’t there, and Petrovitch had no watch or phone to tell him the right time. He could be late, or early. The only thing he was certain of was that he had the right day. So he stood under the Wellington Arch while a dozen vaguely human-shaped piles of bags and blankets slept around him, making the most of the shelter.

In the distance, he heard the sound of bells ringing the half-hour. Now Marchenkho was late. He jumped up and down and swung his hands around, both trying to keep warm and wishing to evaporate the cold sweat that had broken out across his body. He shivered.

In the distance, coming up Grosvenor Place, was a line of black cars. At first, he thought it another strange computer-directed aberration, but then he saw more clearly. The cars, six of them, circled the monument once, and then parked up against the curb.

People, Slavs like himself, slowly emerged into the dawn air, well wrapped up to conceal their firearms. Petrovitch made sure both his hands were on show as he approached.

“Hey, Yuri.”

Grigori narrowed his eyes and raised his chin. “Petrovitch. I lose, then.”

“What?”

“I bet fifty euros you wouldn’t show.” He leaned against his limousine and knocked on the rear window. It slid down.

“Dobroe utro, tovarish.”

Petrovitch peered in. “Yeah. I can’t believe you have a Zil.”

“Why not?” said Marchenkho. “Zil is a good car. Reliable. Armor plated.”

“Parts must be a bitch.” Petrovitch ran his hand across the polished, waxed roof, leaving a trail of sticky fingerprints.

“With money, anything is possible.” Marchenkho stroked his mustache. “Are you armed?”

“You don’t bring a knife to a gunfight.”

“This is good. What do you need?”

“Nine millimeter for the Norinco. Point three two for the Beretta.”