I was able to observe another key moment in the process, however, when I accompanied the then Chancellor Helmut Kohl to Moscow in October 1988. Two images stuck in my mind. One was the sight of hundreds of so-called Volga Germans returning "home" to a country from which their ancestors had emigrated in the time of Catherine the Great. Kohl may have hoped to rejuvenate the ageing indigenous German population by bribing the Kremlin to let these ethnic German Aussiedler emigrate; if so, he failed. But the other abiding memory of that trip is even more revealing: Alfred Herrhausen, the head of the Deutsche Bank, who was there to offer the disintegrating Soviet economy huge state-backed soft loans. He allowed me to interview him with a Financial Times colleague in his lavish Moscow HQ. The visionary banker was already paving the way for the deal that would set the seal on reunification when Kohl and Gorbachev met in the Caucasus in 1990. By then, however, Herrhausen was dead: killed by a terrorist bomb, the last bloody stunt of the Baader-Meinhof gang.

In the summer of 1989, the Telegraph moved me from Bonn back to London, to become Eastern Europe correspondent. Across the world in China, the empire struck back. In Tiananmen Square, students were slaughtered by Deng Xiaoping's minions; he was congratulated by Honecker's heir apparent, Egon Krenz — a gesture for which Krenz was not forgiven. But in Central Europe the pace of events began to quicken, as the ancien régime of Lenin's heirs began to disintegrate. The first country to dump communism was, predictably, Poland, followed by Hungary. By this time, Hungary had made the first breach in the Iron Curtain by opening its border with Austria. Thousands of East Germans began to make their escape both via Hungary and through the West German embassy in Prague. On 4 October, Gorbachev came to East Berlin to celebrate the 40th anniversary of the GDR. There was nothing the Stasi could do about pro-Gorbachev demonstrations, but the evident impatience of the Soviet leader with Honecker's resistance to reform sparked protests immediately after the visit. As demonstrations in Leipzig grew by the week, even the Stasi could no longer guarantee order. Honecker's attempt to crush the protesters by force — the "Chinese solution" — was thwarted and he was forced out of the Politburo. 

Krenz, who took over as party leader, pretended to be a German Gorbachev, but he was neither loved nor feared, merely held in contempt. He tried to relieve the pressure with a new travel law, permitting visits of up to 30 days per annum to the West, but not emigration. It was a classic case of too little, too late. On 4 November, half a million people marched in East Berlin to demand freedom of the press and freedom to travel. Meanwhile, Krenz had visited the Kremlin to reassure Gorbachev that he was still in control. He promised that the police, together with "certain elements" (presumably military), had plans to prevent a mass attempt to rush the checkpoints along the Wall. (In the event, there was no such plan.) However, individuals who tried to cross the Wall would no longer be shot. A new travel law would allow free movement to all countries, with the state using passports and exit visas to maintain an orderly flow. Dismantling the Berlin Wall was not discussed, though we now know that Gorbachev and his most senior colleagues had briefly considered that option in private, only to dismiss it as far too risky. The idea that the people might take the matter into their own hands was not taken seriously.

Back in London, I felt frustrated not to be back in my old haunt. I recall waking up in the small hours, thinking: "I should be in Berlin!" Finally, on 8 November, the Telegraph allowed me to fly out there. I stayed at the pompous new Hotel Grand in East Berlin, lavishly equipped with Stasi bugs and spies, but with the same wretchedly few telephone lines that meant we journalists had to dial many times to get a line to the West, even though the Wall was visible from one's room.