The UK presents an interesting dilemma for the Allies because their empire is spread out over the entire world. So you want to use a strategy that you think will maximize those units (already on the board) potential while you allow yourself the time to build up your army/navy from London and move out from there.
Shortly after the recent release of Axis & Allies Guadalcanal [Amazon] Avalon Hill published an Gudalcanal FAQ for the game based on questions from the designers and various players, including players from this site. Before the FAQ there were mote articles about the game that were published. First was Developer’s Notes Part 2: The Guadalcanal Battle System and the second was Developer’s Notes Part 3: The Economy of Guadalcanal.