Hi,
Me and some friends are wanting to travel in France, Italy and Switzerland but won't know until about a month before if we can stay for 10 days or 15 days. So I wondered if we booked seats for us doing 15 days as we want to add the extra 5 days on at the end when we're in Italy. Would we be able to cancel our seat reservations for the trains in Italy and then change our eurostar seat reservations to being earlier.
