Did the Royal Navy consider putting a gas turbine into a motor gun boat?
Short answerYes. Postwar Vosper designs are the place to look for turbine-powered fast-craft development.
NotesThe answer points toward postwar Vosper designs without naming a wartime installation. This keeps the turbine idea separate from the Packard- and Griffon-powered craft discussed later in the stream. It identifies a continuation of the fast-boat design story without claiming that wartime motor gun boats used turbines. The passage is a research lead rather than a complete account of a particular class or machinery fit.