he disputed the Golitsyn claim that the "Sino-Soviet split was a charade to deceive the West". Accusing Harold Wilson Golitsyn said that Harold Wilson (then prime minister of the United Kingdom) was a KGB informer and an agent of influence. This encouraged pre-existing conspiracy theories within the British security services concerning Wilson. During his time as president of the Board of Trade in the late 1940s, Wilson had been on trade missions to Russia and cultivated a friendship with Anastas Mikoyan and Vyacheslav Molotov. He continued these relationships when Labour went into Opposition, and according to material from the Mitrokhin Archive, his insights into British politics were passed to and highly rated by the KGB. An "agent development file" was opened in the hope of recruiting Harold Wilson, and the codename "OLDING" was given to him. However "the development did not come to fruition," according to the KGB file records. Golitsyn also accused the KGB of poisoning Hugh Gaitskell, Wilson's predecessor as leader of the Labour Party, in order for Wilson to take over the party. Gaitskell died after a sudden attack of lupus erythematosus, an autoimmune disorder, in 1963. Golitsyn's claims about Wilson were believed in particular by the senior MI5 counterintelligence officer Peter Wright. Although Wilson was repeatedly investigated by MI5 and cleared of this accusation, individuals within the service continued to believe that he was an agent of the KGB, and this belief played a part in the coup plots against him. Accusing Urho Kekkonen Golitsyn said after his defection that the Note Crisis of 1961 was an operation masterminded by president Urho Kekkonen of Finland together with the Soviets to ensure Kekkonen's re-election. Golitsyn further said that Kekkonen had been a KGB agent codenamed "Timo" since 1947. Most Finnish historians believe that Kekkonen was closely connected with the KGB, but the matter remains controversial. Golitsyn and Nosenko In 1964, Yuri Nosenko, a KGB officer based in Geneva, Switzerland, insisted that he needed to defect to the United States, as his role as a double-agent had been discovered, prompting his recall to Moscow. Nosenko was allowed to defect, although his credibility was immediately in question because the CIA was unable to verify a KGB recall order. Nosenko made two extremely controversial claims: that Golitsyn was not a double agent but rather a KGB plant; and that he had information on the assassination of President John F. Kennedy