Newcastle High School for GirlsCredit:North News & Pictures ltd In a statement, GDST said: “We can confirm that Hilary French has been dismissed from her role as head of Newcastle High School for Girls (NHSG) following an internal investigation into allegations of dishonesty relating to expenses claims.”The police have been informed. We are not able to comment any further about this. “Mrs French has denied any dishonesty in relation to her expenses claims or otherwise. She also claims the investigation and disciplinary process were unfair and is challenging them in an employment tribunal. The letter to parents, jointly signed by the GDST’s chair and chief executive, says: “We wanted to make you aware, as soon as we were able to, that Mrs Hilary French has been dismissed from her post as head of Newcastle High School for Girls, following an internal investigation into allegations of dishonesty relating to expenses claims.”This is a decision that has been made following a rigorous internal process. The police have also been informed.” It also says: “We appreciate this may come as a shock to you, as it has for everyone at Newcastle High School for Girls.”You may wish to share this news with your daughter. Please be assured that, while our staff can’t discuss any details, if any pupil is affected by this news, she will be supported as always.”The school’s senior deputy head, Michael Tippett will become the new headteacher. The GDST letter to parents says that he has “the full support of all the staff at NHSG” adding, “having your support will be invaluable in ensuring that the school can carry on as normal, with your daughters’ education remaining our top priority.” A leading girls’ school headmistress has been sacked as police open a fraud probe into her expenses claims. Hilary French has been struck off from her post at Newcastle High School for Girls (NHSG) following an investigation into allegations of dishonesty relating to expenses, the Girls’ Day School Trust (GDST) said.Parents were told of Mrs French’s dismissal in a letter on Friday, which also said that the decision was taken after a “rigorous internal process” and that the police had also been informed.Northumbria Police said in a statement: “A 62-year-old woman has been arrested on suspicion of committing a fraud against Newcastle High School for Girls. She was later released under investigation and inquiries into the fraud are ongoing.”Newcastle High School for Girls is part of the Girls’ Day School Trust (GDST). Mrs French was later released under investigation and inquiries into the fraud are ongoingCredit:Tim McGuinness/ncjMedia Ltd Mr Tippett has taken over all of Mrs French’s responsibilities relating to the school, with the full backing of the school’s senior leadership team, as well as the chairman and chief executive of the Girls’ Day School Trust.”He is focused on ensuring it is business as usual at NHSG.” Newcastle High School for Girls is a fee-paying school teaching three to 18-year-olds. Last year, 84% of its GCSE entries scored at least a B grade. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.