I know the boat, it is for sale in Outboard and hydroplane services in Merseyside.
Its just an old 16ft phantom with a 150 merc on the back, which is in very good conditiion, seviced regularly as I have been told. The boat is made to look like a tandem deck, but its been fabricated out of aliminium which is a very professional job. The boat has raced at Carr Mill Dam, St Helens.
I believe that the owner has retired from racing or something similar.
Hope this is of some help!