Think it was a P1 between junctions 5 and 6 anti-clockwise M25 12:00-12:30 AM on Friday night/Saturday morning.
Very destinctive number plate and an Exhaust to match.
Me.... Green 4 door '98 with Prodrive wheels.
Sorry I didn't wave, didn't notice you untill you pulled away, I had a fixed stare at the fuel gauge coz was running on fumes and preying I'd make it to Clackett Lane services. Hence I was doing about 50mph.