Manos, Absolutely, just too good a chance to miss,
the problem is that in the UK the rib industry has developed from a cottage industry with lots of people setting up small businesses producing ribs over the years. Sadly some didn't make it. Trying to trace moulds and defunct companies will be very difficult. Given the fading on the tubes think the boat is going to be early 80's. Also the tubes look as if they are held on with a metal strip trapping a tube flange against the hull. This isn't a cheap approach and allows tubes to be replaced easily (albeit by removing thousands of screws). This is often seen on comerical ribs like Halmatic, early Osprey Falcons etc.
Again that console isn't familiar, is it original or is there evidence that it was added later? it
You need to contact some of the old and bold and ask them to cast there minds back two decades, so the 3 people I can think of are, Kevin Goulding Hotribs, Tony Lee-Elliott (Flatacraft) or Paul Lemmer.
Any chance that the hull plate is hidden by the Ali extention ? or how about an ex North Sea rib.