Hello Paul,
Yes it was indeed that boiler that exploded. I watched the fiasco from the shore. I never actually saw the boiler, only the steam launch in full flight. Fred told me that he had soft soldered the place where the gauge glass had been. Only now, some 30 years later, do I understand what he meant by this, having seen seen a photo of the boiler!
I have now found that Wilesco still exist and they have an agent in this country (Forest Classics). It would seem that I can buy a boiler for the Wilesco at a reasonable price. The photos of the boiler look as though they are stainless. If that is the case, I am not sure what Fred had soft soldered and I shall never find out as he died at the turn of the century.
The explosion was quite quite shattering, bits of steam launch flying in the air! Fred had used a butane fired heater and no safety valve, what the pressure was when the shell let go is mind boggling. I thought that it would be a quiet afternoon watching the launch chuff around. I didn't think for a minute that he was a lunatic.
Andrew.