BiG E will confirm the time.

Start Thurock - Bllomin early
Dartford Tunnel
Blackwall Tunnel - 30mph camera on approach
Limehouse link Tunnel - Avg speed cameras
Rotherhythe tunnel - Avg speed cameras
Tower Bridge - Photo shoot
Tooley street tunnel - Loud and no cameras,
Southhampton row underpass
London Eye - Photo Shoot
Westminster bridge - Big ben Photo shoot
Buckinham palace/The mall - Photo Shoot (you have to do this in less than 5 seconds)
Ace Cafe - For full breakfast

Fantastic route and we did it all in 3 hours