Jemima Goldsmith Lists £6.5M London Mansion for Sale

For nearly 30 years, 's quirky West mansion has been a bustling family home for her children and a sanctuary for A-list stars and the political elite.

But the sprawling home is now on the market for £6.5 million, with friends saying Jemima, 52, experienced a case of 'empty nest syndrome' after her sons and stepdaughter moved out.

The screenwriter and producer is said to be keen for a 'new start' ahead of her marriage to billionaire financier Cameron O'Reilly, and plans to divide her time between his house in Switzerland and her £15million manor house in the Cotswolds.

Ms Khan bought the five-bedroom London house, Britannia Studios, in 1999 when she was heavily pregnant with her second son and married to cricketer Imran Khan, who went on to become the prime minister of before being jailed on corruption charges.

But it was put on the market on Friday and Ms Khan told The Mail on Sunday: 'After nearly 30 years here, my kids have moved out and I've finally decided to move.'

A source said: 'She's considered moving before but it's been hard to find somewhere as secure and private. It's a classic case of empty nest syndrome. It's time now for a new start as she gets married.'

Visitors describe the home, on the Chelsea-Fulham border, as more like a New York loft than a conventional family property.

At its heart is a 49ft open-plan kitchen, dining and sitting room, while the interiors are a blend of faded grandeur and bohemian comfort.

Jemima – the daughter of late financier Sir James Goldsmith and his second wife, Lady Annabel – divorced Khan in 2004.

Friends say her emotional attachment to Britannia Studios waned after her mother's death in October, aged 91.

The MoS last month revealed her engagement to Mr O'Reilly, the son of late Irish media magnate Sir Anthony O'Reilly.