Just had a look at it-you can book flights and train from U.K, but not the ferry option.
It's interesting as well that they list children up to the age of 17. I ran the package I booked through it and it still came out at the same price as my holiday in October of three adults, one 5 year old (one "adult" who will be 13 next visit-not that I mind, shes taller than some adults I know and eats more than me!! :shock: :lol: )
You'll also notice that when you get to the order review page it tells you what attractions are closed then.
You still cant add your extras, like character breakfast and Buffalo Bills on, but I like it. Definately an improvement.