Looks like a Vincati, which I’ve always thought was the best looking Vincent hybrid (not that there is anything wrong with the standard bike). I saw two Australian Vincatis on the Isle of Man and they looked just right. It spurred me to look for an old air cooled Ducati to convert using my Norvin engine. I even went to somewhere near Manchester to look at one, it turned out to be an 850 or something, and I really wanted a 750 sport or 900ss.
Friends used to call my Norvin a real hooligan bike, they used to complain about the noise from the megaphone and wouldn’t ride behind me on runs. It started off as a cafe racer but it was too uncomfortable to ride, it gradually lost the clip-ons, rear sets, thin seat etc. but the wideline frame, 5 gallon tank and high centre of gravity couldn’t easily be changed. It got to the stage where I had three Vincents in the Garage, I would use the Rapide for touring and A roads, the Comet (single cylinder, lighter and shorter wheelbase) for blasting round the local Welsh back roads and never really rode the Norvin, so I sold it.