On another note, consider the Dover Calais Ferries:
One of the easiest and most pleasant ways to get from southeast England to northern France is via the Dover Calais Ferries. It’s a relaxing, picturesque 75-minute ride past the infamous White Cliffs of Dover. It is here that the English Channel is at its narrowest point.
Onboard you will find a bar with a jukebox and wide array of drinks. There is a Food Court boasting different restaurants with delicious cuisine from around the world, or coffee and snacks for a lighter fare. There is also complimentary Heinz baby food available for the wee ones, and shopping to keep you entertained, or you can take in the sights with a stroll on deck. For folks traveling with children, there are play areas, video games and fun activities that are supervised like painting and drawing to give parents a break.
For those who wish to enjoy a more luxurious experience, there is the option to upgrade for priority boarding and for access to the Club Lounge where a complimentary glass of champagne awaits you to start your trip off right. You can also dine at the Langans Brasserie where you will be served in style.
So instead of taking the train or a plane, sit back and relax onboard the Dover Calais Ferries.