In reply to Dave McKechnie: I'm just back yesterday.
If you're going through the tunnel then its worth a pull into Calais for fuel. At the big Carrefour its €1:33 for diesel.
Toll roads are far quicker, but €75 each way as said.
If you are on the toll roads then you must stop for food at the giant chicken services - if you've never been to Cham before then just keep your eyes open & you'll know when you see it. Was told on this trip that its rated as one of the 3 best services in Europe.
We saw a lot of police stops as you exited the paeges this year & true to reputation they did only seem to be stopping the cars with foreign plates. Just make sure you've got all the kit that you're supposed to carry. Also remember that you have to be able to put the hi-vis vests on before you get out of the car, so they're no good in the boot. You must have a vest for everyone in the car.
Oh & have fun!
K