Managed to recover

["Athlee Maclear" <athleem gmail com>]

Panic over - managed to recover most of document. Uncompressed gnumeric file and edited raw xml - had a hunch it was the comment objects I inserted yesterday, so removed them all. Then opened fine. 

I apologise for wasting your time.

-- 
Athlee Maclear

"May you be poor in misfortune, Rich in blessings, Slow to make enemies, quick to make friends,
But rich or poor, quick or slow, May you know nothing but happiness From this day forward."