Joe, it's looking quite real. I emailed Martin at Birnam CDs. I also inquired whether the appeal met Andy's approval, and suggested a reissue of his long out of print songbook would be a very good way to raise funds. Here is his reply:

"Thanks for your message.
I can assure you that the appeal is genuine. It has been set up by Andy's sister who now lives in New Zealand. I have been in contact with his sister a couple of times this week and I can confirm that her efforts have Andy's full knowledge, consent and, indeed, his gratitude.
Publication of his songbooks is a good idea, but I am not in a position to do anything in that regard.
I am hoping to visit Andy this weekend and I'll suggest this to him and find out what would need to be done to make this happen if it's possible.
Meanwhile, the appeal has already had a fantastic response. Please share it around any folks you know who may be willing and able to help. Thanks."

Kind regards,

Martin
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When I hear more, I'll post it here.
Maeve