One thing to be careful of:-
When I booked my Class 1 medical (May 2005), the person I spoke to was careful to ensure that the date I selected was OK because there is no refund if you can't attend. I said the date was fine and confirmed it.
A few days later, I received a collection of bumpf in the post from the Medical Division and one of the memos stated that I may require a particular type of eye test which would involved squirting some "stuff" into my eye and it would mean that I would not be able to drive for a few hours as my vision would be blurred.
Oh great! Thanks for telling me!. I was straight on the phone to them and pointed out that if there are no refunds for cancellations, then this sort of information should be mentioned BEFORE you confirm the date.
As it turned out, I didn't need this test but be aware that it could be a possibility and if you are going to be affected, make sure you have alternative arrangements.
Cheers
Whirls