Above: Six of the seven outfits being sold by Christie's as part of its 'London' sale.

The seven lots, which include the navy suit Thatcher wore when she was nominated as Conservative party leader and a pearlescent "Coktail Ensemble", are each expected to fetch between £1,000 to £1,500.

Thatcher discussed one of her favourite outfits, a yellow and navy jacket and skirt (pictured above, top centre), in an 1978 interview with The Birmingham Evening Mail.

The interviewer wrote: "[Thatcher] delights in showing me a smart navy-edged-with-yellow Mansfield dress and jacket. 'I got this in 1973 when Princess Margaret came to the Ministry. But it's still ‘best’.'

The writer adds: "She shows me the hem she's let down herself. [Thatcher said:] 'It wasn't the sort of thing I dare trust to anyone else to do. My mother was a dressmaker.'"

Margaret Thatcher's Fashion Sale