Brian, in warships there is (with the exception of Fast attack crafts) just the scale 1:100. I have done all my warships (HMS Lord Nelson, HMS Mohawk, HMS Velox, P-38) in scale 1:100. The 70` CMB was the exception (scale 1:24)
The Black Prince ...- oh dear- this will be started when I have found the place where to keep her in my flat..., the Swift, probably next spring. First of all the refurbishments need to be done, then I will start with the Soviet Motor-Torpedoboat (scale 1:24).
After that, Swift or Black Prince will have a go....
The M-class you are talking about, which year is it? WW1?
Jörg