This is a Porsche 911 R, though its registration plate is registered in Deutschland, and that registration plate reads [S . GO . 5024]. You may recognise this (if you have a keen eye). It has been in a few photos, and, yes, that short Top Gear Film, with Chris Harris driving it (and his Peugeot 205 Rallye). This I saw in the early hours of Tuesday, in Clifton.