What 1936 foreknowledge would change in British Pacific defense

What would the Royal Navy do in 1936 with reliable knowledge of Japan's wartime operations from 1941 to 1944?

Accelerate rearmament, repair Singapore's defenses, and use the evidence to build earlier cooperation with the United States.

The first problem is proving that information from the future is credible enough to shape policy. If accepted, it would make a naval building pause politically impossible and force renewed attention to Singapore's defenses. Britain would quietly accelerate ships and supporting preparations, then share enough evidence with the already suspicious United States to align the two largest navies. The proposal also raises a question about whether such information could reveal German and Italian plans as well.