I remember when that tunnel was being built as I was passing through the English channel by ship. Kind of neat to think there was construction going on beneath these waves. Both those advices seem pretty dire. Bottom line, have your ducks in a row before you fly out.
Buying a confirmed ticket then reimbursing at a zed level? It would never fly here in the states. That's a situation that is considered abuse of your flight priveledges and possibly fired over it. I don't know how you managed that one Nick. How can you buy a confirmed ticket, then use it, then ask for a Zed fare reduced later? Everyone would be doing this and flying positive space?????? Comon Nick. I find this highly suspect.