I like the way you think. Attlee wins in 1951 (or just gets a sizable enough majority in 1950 that he doesn't have to call another election) and steps down in 1955 in favor of Hugh Gaitskell. Gaitskell decolonizes Africa at a similar rate to OTL but is able to act on the 1956 Malta integration referendum and give them seats in Parliament. Follow down that road and you could probably see Parliament seats for Gibraltar, Singapore, and some Caribbean colonies (the Bahamas, Jamaica, etc.). As for Suez, when Nasser nationalizes it, Gaitskell protests but in the end just pays up (like I said Suez killed this). You could also see Northern Borneo stay British (or alternatively just hold onto Brunei past 1984).
However, there is no way Malaya and Africa get decolonized in the 1950s (successfully, I mean). Britain's African colonies were able to succeed in part to due to the tradition of law and good government in the British Empire and due to the fact that Britain invested in training government officials to take over when they left (and they left before they were fully done training them due to pressure to decolonize). If Britain pulled out of Africa in the Fifties, you'd see more failed states in Africa. Similarly, if you pull out of Malaya it either gets took over by the Communists or by Sukarno.