Princess Diana had it out with Camilla at her sister's 40th birthday party, writes ANDREW MORTON 

(August 30 05:01) Dailymail.co.uk

ANDREW MORTON: Nobody expected me to turn up to the party [thrown by Lady Annabel Goldsmith in February 1989 for Camilla's sister's 40th birthday].

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Princess Diana had it out with Camilla at her sister's 40th birthday party, writes ANDREW MORTON&nbsp;