Aha, braving RIb.net from ybw.com I see!
Flatacraft are one of the oldest names in RIB manufacturing with Tony Lee Elliot the founder being a well known and respected name in RIB circles. I am unsure as to whether they are still manufacturing but they did build a range of 4m+ RIBs called Force 5, 6 etc etc. They also (and this should interest you given your location) supplied a number of pursuit RIBS (9m twin outboards) to the Gibralter Customs.
There are contact details for Tony Lee Elliot in the rib.net directory. Assume your query relates to a potential second hand purchase? Might be worth contacting Tony to see if he can help?