James, if you are following the route plan from your earlier post, how about we meet near the Chalk Farm tube stop? After passing through Camden Town on Camden High St/Chalk Farm Road, take a left on Adelaide at the station and drive up to Primrose Hill Rd. I can meet you at that intersection at 5:30, then we will head to the M1 via Finchley.
We can meet Rohan at M1 exit 8 - Breakspear Way/Green Lane around 6am - although it doesn't look like there are any services near there.
Does that work for you guys?