We (two of us) are arriving in Gatwick at 5:15 PM on May 7th, and continuing on to Canterbury to join the RS Villages of South England tour. I don't want to purchase advance train tickets to travel from Gatwick to Canterbury in case the flight is delayed. Walk-up train tickets appear to cost around 45 pounds each. Another travel option would be a car service that would cost just a little more than two train tickets.
Which is the better option - train or car service?
(Cross posted in the England and RS tours forums).