London to Paris: Route Advice

I am cycling L-P with a group of pupils from my school in order to raise a load of cash for charity. We are leaving this Sunday. Because it is with kids, I have had to be V precise with my planning - choosing a quiet ish route etc. I have google map links or publisher or pdf files of the route that I have turned into booklets for each rider. You are more than welcome to these if they would be of use. Just let me know. I will be able to tell you next week whether the maps are any good and if the kids make it.

Did they?