This was about 4 years ago for us. I believe that we bought the tickets the day or two beforehand. We were in London for a week, staying in the Victoria Station area. It was nice actually talking to a person about the different options. Our train originated at VS so was empty when we boarded. by the time we got to Dover our car was about 1/3 full. I want to say that the trip took about 1:30-1:50. Was lovely looking at the scenery. One of the cities had a fantastic cathedral that was easy to see from the train. After our cruise we took the train back into London to St. Pancras to catch the Eurostar to Paris.
We are looking at a cruise next year that ends in Dover and will take the train "someplace" after the cruise. Need to figure that out. Stay in the UK and go to the castle in Dover, stay in the south between Dover & Southhampton or go to
Disneyland Paris. Decisions, Decisions!!