A CLEANER has claimed a prestigious boarding school discriminated against her because of her mental health. The single mother from Thatcham is suing Bradfield College, Bradfield, where annual boarding fees are £45,300. Kirsty Cush, aged 35, of Halifax Place, is suing for unfair dismissal, disability discrimination and for money owing to her under Wages Act legislation. The college is contesting her claim. Ms Cush told an employment tribunal in Reading that she was discriminated against because she suffered post traumatic stress disorder (PTSD) and was signed off sick by her GP. The tribunal wa…