Why was Manila not one of the Royal Navy's Far Eastern base choices?
Short answerIt was American rather than British, so it mattered mainly as an allied springboard in a joint war against Japan.
NotesA viewer raises Manila during the survey of possible Far Eastern bases. The American-held port was not a Royal Navy base candidate in its own right. It becomes useful if Britain and the United States fight as allies, allowing British forces to use the Philippines while advancing toward Japan. The exchange distinguishes sovereign basing choices from facilities made available through coalition strategy.