Hi Eire,
Elaine, Jackie, Elaine and Reid welcome you to DLP DIS board
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There is a current early booker offer, I believe, on the UK Disney site. If you book a September/early October trip before the end of April, you can get £100 off the total price of the hotel/tickets package. Now, I don't know if this ties in with your dates, or if the early booker is still available on your choice of hotel (this offer has been advertised for at least 3 months now, and is subject to availability).
Last year also, Disney advertised 25% off their packages for trips in October, towards the end of the summer.