Thanks for the help knocka, No it was smaller than that, if you have any pics of Work Boats at all, she looked like a 40″ AWB Short GRP Cabin as with No: 442, but I remember she had an aft covered section like the 39″ Misellaneous Motor Boat No:169.

I clearly remember that the forward cabin was right at the front and she had sloped windscreens and the engine was a diesel of American make (Packard IIRC).