Found a small article re 1969 Round Britain race with finishing results -
The race attracted a variety of boats, from the pint-sized inflatable Psychedelic Surfer to an (unarmed) patrol boat. Also, a team of four Fairey cruisers driven by Lady Aitken, Peter Twiss, Derek Morris and John Freeman was entered for the purposes of diesel engine development by Ford Europe, while other racers included Avenger Too, Maltese Magnum Twin and UFO.
Partly due to mercifully settled weather, 33 of the 42 starters reached Inverness, though much midnight oil was being burned keeping craft afloat. The first leg of the trip south saw a change in conditions: rougher seas and a blanket of fog vastly reduced speeds as contenders groped their way to Dundee. Both Maltese Magnum and UFO ran aground, while the team of Makinen, Watson and Hendicot, in Avenger Too, wisely followed radar-equipped craft to find their way.
At the line it was Avenger Too first with UFO second. David Morris, at the helm of Fordpower, was third, Peter Twiss in Fordsport fourth and Lady Aitkens Fairey fifth.
It was a hugely impressive performance by Faireys and Ford Europe; however, it would be some time before another Round Britain was raced.
I'm still on a mission to find info about a story mentioned at Warwick Show regarding Peter Twiss driving a gas turbine powered Huntsman?
the gent who related the tale had vivid memories of going out on the boat as a boy, to date I cannot find anything re this.
regards Paul