Just in case anyone is looking for GPX files for a London-Paris 24 hour route (Dover/Calais), we did this (self-organised) back in 2011, and have a resource file that may be useful to you in planning your trip.
Hello John
We’re planning to do this in early July and I’m thinking about planning the exact route.
Any chance you could let me have the detailed GPX files and your view of any important watch outs please?
Thanks very much
Azon
I am planning to ride with three others from London to Paris via Calais and would love to see the GPX route you took to get there. How was it, did you accomplish it and any top tips at all?