David Cameron's "family champion" has quit as chairman of her welfare-to-work company A4e.
Emma Harrison's resignation comes a day after she quit her role as the Prime Minister's back-to-work tsar amid a police probe into a string of fraud allegations against the firm.
The former unpaid Downing Street adviser said she was standing down because she did not want the "continuing media focus" on her to be a "distraction" for the company.
Ms Harrison said: "This has been a very tough decision for me as I have spent my entire 25-year career building up this business and I believe so strongly in the importance of the work it does.
"But it is precisely because this work is so important that I do not want the continuing media focus on me to be any distraction for A4e, for its more than 3,500 employees, and for the tens of thousands of people across the UK and globally that look to this company to give them hope of finding employment."
The 48-year-old, who swapped her country mansion for a week on a council estate when she appeared in Channel 4's Secret Millionaire reality TV show in 2007, founded A4e in 1991.
It makes virtually all its money in the UK from Government contracts by running schemes to get 120,000 "problem families" back-to-work.
Earlier this week it emerged four former employees were arrested by Thames Valley Police at the firm's headquarters in Slough in January on suspicion of fraud and bailed until mid-March following an internal investigation by A4e.
Pressure is now building on the Government to suspend the firm's existing taxpayer-funded contracts.
Questions have also been raised about how much Ms Harrison pays herself.
The firm paid £11m in dividends last year, 87% to Ms Harrison, one of its five shareholders.


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