Free Eurotunnel option: what happens if we don't use it?
 

We want to fly & get cheap Easyjet flights but we're going in February and the Eurotunnel is free with the hotel booking anyway so I thought we might as well book that option. If the airport is snowed in it may prove useful to have a backup!
However, I'm a bit worried that if we don't turn up for the train, it'll be a problem: anyone know please?

I phoned and found out! Apparently we can just cancel for free!