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Heather Mills is being taken to court by her former nanny Sara Trumble over a spray tan, which she claims she was forced to regularly give her employer.
A case has been filed against the former model by Sara Trumble, who despite being hired as a nanny to Heather and her ex-husband Sir Paul McCartney's daughter Beatrice, now five, alleges she was forced to use a tanning machine to give the naked star a bronze glow, work unreasonable hours and blow dry her employer's hair.
A spokesperson for Heather - who has reportedly refused the chance to settle the sex discrimination case out of court - said: "Heather is devastated that Sara, who Heather considered a part of her family, should choose to level these accusations at her. This claim will be vigorously defended.
"Heather is baffled and hurt. These are unsubstantiated accusations."
Sara - who says she was forced to work until midnight to dry Heather's hair after beginning her day at 7.30am - is also expected to claim she was intimidated by the charity campaigner, who demanded she keep silent about everything she saw and heard.
The 24-year-old nanny, who resigned in September, lodged a constructive dismissal claim with an employment tribunal in Ashford, Kent, last week.
In the complaint, Sara states her job had changed when she returned to work following maternity leave earlier this year.
A source close to Heather insists the charity campaigner always treated her employee well, saying: "Heather gave Sara an awful lot of things. When Sara resigned, she got a car as a leaving present for goodness sake. She also paid for her to have private medical treatment. Heather is baffled and hurt. These are unsubstantiated accusations."
Heather, 40, is expected to defend herself by saying Sara was employed as a housekeeper not just a nanny, and was showered with gifts, including a lavish holiday to thank her for her work and Beatrice's old clothes for her new baby.
The two parties have 28 days to reach a settlement before the case goes to a tribunal.
- BANG! SHOWBIZ