I do not know Happy Dolphin but Hull No 133 was moulded in 1974 and completed for R.H.Hawes, not by C&N, in 1976. She was called SOLENT ARCTURUS was British Registered No 362825. Between 2000 and 2004 and maybe earlier and later she was called RICHARD LANGHORN and based in Portsmouth. I think she was used to take disadvantaged children out sailing by the Richard Langhorn Trust. I would be delighted to hear from Roy Abrams.
Hi I got the first name wrong (my memory) sail well gone now my conclusion is not positive or negative its likely to be 133 but it could be it had a second hand sail
I have a ssr reg but number is not same as British reg no you give
Will investigate more
ps 2009 sailed from canaries to Turkey single handed
2010 sailed from Greece to Spain
2011 just finished cross/round Atlantic cruise
Back home now for a much needed refit
Welcome to our group Roy, I am confident you will find very helful and informative in the future, good luck finding the number I am sure Jeremy will find it if anyone can.