Shortly after the collapse of the Soviet Union I was invited to join a private train for its first – and, as it proved, only – excursion, from St Petersburg to Tashkent. Things in Russia had changed a lot, mostly for the worse. The streets of former Leningrad had been commandeered by homeless urchins and men in dark glasses with mobile phones. In a hotel bar, a drunken Red Army veteran pulled a pistol on me. Moscow seemed more dilapidated than ever, but L’Oréal perfume was on sale at the GUM store. As the train puffed south towards the Caspian Sea, blank and hungry faces stared from desolate village halts, and the carriage windows were locked for the passengers’ protection.