Thatcher tripped over a manhole before a Conservative Party Conference
In a letter written to the mayor of Bournemouth, published as part of the latest release of her personal files, she apologised for pulling out of the civic ball on the evening of October 7 1986.
"I am so sorry not to be with you this evening," she wrote. "As you may have heard I tripped over one of Bournemouth's manholes this afternoon and my ankle didn't like it very much.
"Neither did the manhole!"
She praised the mayor for giving a "marvellous speech" earlier in the day which "got the conference off to a really good start", signing off: "Every good wish, yours sincerely, Margaret Thatcher."
In another unusual episode Baroness Thatcher was invited to open the newest phase of the Broadgate development next to Liverpool Street Station, and developer Godfrey Bradman was insistent she should arrive by helicopter for a photo opportunity to be used for publicity.
Thatcher apologised for pulling out of the civic ball on the evening of October 7 1986
She refused, fearing she may be criticised for its extravagance, and then a more bizarre request followed – for her to wear "a shiny hat which could catch the reflection of a helicopter model".
A now-published note written by Baroness Thatcher's then private secretary for home affairs Mark Addison contained details of the request from Mr Bradman's team.
"A slightly odd request, though one can see the reason for it," the note said. "This is very much something for you to decide on.
"Agree to this suggestion, or prefer to stick with a straightforward hard hat?"
Margaret Thatcher: Life in pictures
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Margaret Thatcher: Life in pictures 13 October 1925 – 8 April 2013
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Margaret Thatcher on her 84th birthday
In a handwritten note on the margin of the page, Baroness Thatcher wrote: "I really don't want 'gimmicks' to apply to me. An ordinary hard hat. MT"
Details of Baroness Thatcher's relationship with different quarters of the press are contained within the newly-published documents.
Another letter that was published as part of the latest release of her personal files
These include a letter addressed to Rupert Murdoch, dated January 22 1986.
Baroness Thatcher wrote following his visit to the Prime Minister's country home Chequers: "I am delighted that you enjoyed the lunch on Sunday and I am so pleased that you were able to come to Chequers.
"The red roses look beautiful. Thank you very much for this kind thought."