vow that there would be no position for Powell in her cabinet if the Conservatives won the forthcoming general election. In the days after the election, Powell wrote to Callaghan to commiserate on his defeat, pay tribute to his reign and to wish him well. 1979–1982 After a riot in Bristol in 1980, Powell stated that the media were ignoring similar events in south London and Birmingham, and said: "Far less than the foreseeable New Commonwealth and Pakistan ethnic proportion would be sufficient to constitute a dominant political force in the United Kingdom able to extract from a government and the main parties terms calculated to render its influence still more impregnable. Far less than this proportion would provide the bases and citadels for urban terrorism, which would in turn reinforce the overt political leverage of simple numbers". He criticised "the false nostrums and promises of those who apparently monopolise the channels of communication. Who then is likely to listen, let alone to respond, to the proof that nothing short of major movements of population can shift the lines along which we are being carried towards disaster?" In the 1980s, Powell began espousing the policy of unilateral nuclear disarmament. In a debate on the nuclear deterrent on 3 March 1981, Powell claimed that the debate was now more political than military; that the UK did not possess an independent deterrent and that through NATO the UK was tied to the nuclear deterrence theory of the United States. In the debate on the address shortly after the general election of 1983, Powell picked up on Thatcher's willingness, when asked, to use nuclear weapons as a "last resort". Powell presented a scenario of what he thought the last resort would be, namely that the Soviet Union would be ready to invade the UK and had used a nuclear weapon on somewhere such as Rockall to demonstrate their willingness to use it: Powell went on to say that if the Soviet invasion had already begun and the UK resorted to a retaliatory strike the results would be the same: "We should be condemning, not merely to death, but as near as may be the non-existence of our population". To Powell, an invasion would take place with or without the UK's nuclear weapons and therefore there was no point in retaining them. He said that after years of consideration, he had come to the