The Queen mocked Margaret Thatcher's accent and called her 'that woman', a new book claims.
It describes a fraught relationship between the pair, who met weekly at Buckingham Palace when the latter was Prime Minister.
It says the Queen tried to undermine Mrs Thatcher, a grocer's daughter, with "petty class put-downs" and referred to her as "that woman" to Commonwealth leaders after the PM has been disparaging about the organisation.
The pair "disliked each other on sight", it claims, and their repeated disagreements were "very personal, class driven and distinctly female".
Mrs Thatcher's "entire character was anathema" to the Queen, who apparently mocked her accent as "Royal Shakespeare received pronunciation from circa 1950", claims the book, The Queen And Mrs Thatcher: An Inconvenient Relationship.