Hi Jill!
It's a pleasure to answer your vacation planning questions - please keep asking!
I think both ways of making Advance Dining Reservations from the UK are good, but personally I like to book mine online as, from the UK, it's much cheaper! You also will not have to wait for an operator if the lines are busy.
I believe the telephone lines open at 7.00 a.m (EST) - which is 12.00 midday in the UK. I believe the online system opens slightly earlier than that.
If you wish to call from the UK, the number is 001 (407) 939-3463.
When making your reservations
online you can click on "I want to use my dining plan to book reservations", then you'll go to another screen where you can enter your U.S. confirmation number that you can obtain from your UK travel agent. This number should be eight digits - three letters, followed by five numbers. As you wish to dine at
Cinderella's Royal Table, I would try to ensure you have your confirmation number ready before the day your Advance Dining Reservations become available as this dining experience is very popular and I would recommend you try making your booking as soon as you can.
I hope you are successful with making all your preferred reservations. If there is anything else I can help with, please ask me!