Hi Surreysinger
I rang the Festival enquiries office about 5 mins before I wrote the post above. They said the prog wasn't available yet but to send the envelope in ready.
Either they were a bit ahead of themselves when they printed the newsletter or the two offices aren't in contact. (The address I was told to use is the ticket office.)

And, guest jj, it's hard to recommend things without knowing what sort of thing you're looking for.

Sue