Thanks guys for your suggestions, I've googled them and so far none have thrown up my mystery boat.
Your quite right, I did win it for £36-99 on Ebay. I even got a £1-99 discount from the seller as he was amazed that I'd driven 250 miles from Leominster Herefordshire to Falmouth Cornwall to collect my winnings. We spent 21 hours that day driving, loading and driving back at a steady 55mph. It took over 4 hours to bail out the cockpitwhich was full to the brim with water
& leaves. (should of took my gas mask with me), and to winch
her onto my 6ft x 4ft 6" one ton box trailer that I'd extended the draw bar by 6ft, to carry her.
So once again thanks for your suggestions, but the challenge remains open to identify this mystery machine.