My wife and I had a booking on the Eurostar from London to Brussels, I just visited their web site and cancelled the reservation since our entire trip to Europe will have to be rescheduled.
I could only use my name and the six letter booking reference when cancelling to get the eVoucher, I'd like to get confirmation that my wife's ticket will be included since the booking reference is the same for her. It seems reasonable, but I'd like to be sure.