At first I was thinking some sort of old Jag or Rover coupe, then I thought it has an economy of design that is Italian, or Italian-designed at least. Just my thinking, I still have no clue!
Edit: Then I saw a sign, and it was the sign of the Tortoise, which led me to believe it's a Gordon Keeble?
I seriously think it was sheer fluke I suddenly exhibited such Sherlock Holmsian levels of deduction, it genuinely looked like a Brit car with unfussy elegant Italian styling though