Sources for Britain's planned role in invading Japan

Which books or papers cover possible British participation in the invasion of the Japanese home islands?

Andrew Boyd's work is recommended, especially the planned British Pacific Fleet successor to The Royal Navy in Eastern Waters, although that most directly relevant book had not appeared when the video was recorded.

Andrew Boyd is the recommended guide to the planned British contribution, including a relevant section in British Naval Intelligence through the Twentieth Century. Many British Pacific Fleet accounts concentrate on completed operations and give less attention to preparations for the invasion of Japan. That difference in coverage matters when choosing sources for the proposed operation.