To what extent would Gaitskell be willing to hold onto colonial possessions in Africa (as self governing 'dominions') and how without France intervening alongside Britain in 1956, would her African possessions develop?
I doubt Britain would really hold onto her African colonies for much longer than OTL - they offered little real benefit and were only becoming a more contentious issue all the time with the rise of African nationalism - something a world without Suez is not going to change.
As for France, she may remain just that little bit more emboldened than OTL but ultimaately faces the same problems as Britain. She may hold for a few years longer in Algeria but sooner or later public pressure will force her to throw in the towel, along with the rest of her African Empire, albeit later than OTL.
The greatest effects on Britain I think could be a more measured decolonisation - none of the fly tipping of unwanted colonies that occured OTL. Decolonisation takes until the 70's, maybe even the 80's at the extreme end of the scale but smaller, more profitable colonies such as Malta, the West Indes, Singapore and Hong Kong may be persuaded/enticed into staying as part of either a dependancy or an overseas depatment, although Britain may have to adopt a more federal structure for that to happen.
Furthermore, without Suez and the resulting Anglo-European bonding and Commonwealth split, perhaps Britain chooses to build it's future economic development with the Commonwealth of Nations, not Europe. Here a slower and more measured decolonisation may play an important part?
Russell