Interesting variety! Does anyone know anything else about the blue Fowler showman's? Those don't seem to be terribly common and I'm quite fond of the aesthetics.
The 6" Fowler Showmans was built by Martin young in his back garden. he also built a full size Foster Tractor in his back garden. there was an article in OG late last year or this year detailing the build of the engine.
it's very nice and impressive what can be done in a home workshop and back garden!
Foster RL Built by Ali Foster, again was featured in OG last year as a build article.. very nice engine to drive. another friend has the showmans version of this engine. The same but with showmans fittings etc..