The head of a children's charity founded by JK Rowling has stepped down amid allegations of 'bullying and intimidation' by former employees.
One disillusioned worker compared the Lumos Foundation, which was set up to change the lives of orphaned children, to Azkaban, the notorious prison in Rowling's Harry Potter books.
Georgette Mulheir has now left her role as Lumos's £160,000-a-year chief executive.
Anonymous reviews on the employer-rating website Glassdoor variously described Lumos as 'terrible' and an 'awful place to work'. The company is rated 2.2 out of five on the website.
The head of a children's charity founded by JK Rowling has stepped down amid allegations of 'bullying and intimidation' by former employees
A former employee wrote: 'Bullying and intimidation starts with the CEO and trickles down through egomaniacal senior management who run the organisation like it's a private club.
'Prejudiced and bigoted attitude [sic] from senior staff are dismissed as 'personality quirks'.'
Another said: 'Senior management are like headless chickens and don't know whether they're coming or going. Nepotism at play. Most of the directors are blagging through their roles without a clue as to how the organisation should develop.'
Rowling, who was head of the board of trustees until 2014 when she was made life president, is estimated to be worth £750 million.
The charity's board of trustees have commissioned two independent reviews into the organisation's culture in response.
Miss Mulheir has headed the charity since 2011. She joined the charity in 2007 as operations director.
Georgette Mulheir has now left her role as Lumos's £160,000-a-year chief executive. Pictured with Rowling in 2005
The charity, which takes its name from the spell to produce light in the Harry Potter books, is partly funded by royalties from the novels and employs 90 staff.
Rowling set up the charity along with Baroness Nicholson of Winterborne after she read a newspaper article about children in orphanages in the Czech Republic being put in caged beds.
The author said in 2013 how she nearly took a baby girl from a cot during a visit for the charity to a 'cold and frightening' state-run orphanage in eastern Europe.
Neil Blair, 52, chairman of the charity's trustees said: 'the Board of Trustees has identified some management and culture challenges facing Lumos that require