Some people think anything with tubes that looks like a rescue boat is ex rnli... The RNLI did use mariner 40's like that, but shortshaft and tiller control, maybe someone's mentioned that to him, and that led him to believe that it is.
Nothing on the boat looks like it was ever built for the rnli and never heard of a raider class.
Raider ribs were a rib manufacturer about 25 years ago, which matches the age of the engines. Thats what this boat is.
Bit pricey for a RIB with two manual start, manual tilt and smelly two strokes on the back.