It is indeed british, and of 50's vintage.....for a couple of clues, it has a mainly aluminium body and wooden floor...
wheel looks like an old Alvis...or early series 1 Landy...must be a link? so AC or a Bristol perhaps?
pre select box ? banjo wheel, AC gauge panel, alloy and wood, 50s, maybee a riley/ armstong sidley/ daimler/ ???