Mistake!

This says she died in 2003.

https://www.encyclopedia.com/arts/culture-magazines/ray-mary-eva-pedder

Oddly, this is practically the only other (semi-detailed) source for that date:

https://www.thegazette.co.uk/company/00062172/filing-history/ODkxNDg4MjBhZGlxemtjeA

You have to scroll down at least 3/4 to see her name - luckily, the names are listed alphabetically.

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