In reply to Rigid Raider:
Yes, it's at Scottish Mountain Gear. I bought it in Boulder, CO, so not really practical to go back to that shop, though my father, who lives there, may check it out and see if they have any suggestions. SMG didn't seem keen to do any tape or patch job, not being convinced the fabric would withstand it, but if replacing the fly is untenable (they are looking into that for me), I'll go with the tape suggestions above and do it myself. Or the 'wanted' suggestion on UKC, which is a good idea (got an awesome belay jacket that way).
And I agree, I didn't think eight years --even with a lot of Scottish camping -- was that old. That's why I'm so annoyed about this. It's not pitched on glaciers for weeks on end (or ever).
Post edited at 11:56