Does anyone know what this is?

[jhr]

Edit: "Hum Drum" 1967 looks a possible candidate? http://www.powerboatarchive.co.uk/BuilderBoats/Misc/MISC BUILDERS (GB - I & II) (Photos).pdf

[anorak]Hum Drum was a (heavily modified) Bertram 25.[/anorak]

 

[rbcoomer]

[anorak]Hum Drum was a (heavily modified) Bertram 25.[/anorak]

Ah, sorry! Back to trawling the archives then...

(I did wonder if it was a bit early ['67] but that was the nearest I came across in appearance. It's great watching the old video footage anyway. )