Princesses Beatrice and Eugenie have never personally paid a penny in rent, despite living in exclusive palace properties for nearly two decades.A report by the National Audit Office has laid bare some of the cosy deals that working – and non-working – royals have benefited from when it comes to residences.These include Andrew Mountbatten-Windsor's two daughters, who perform no royal duties, but have been secretly subsidised for years by their grandmother Queen Elizabeth and now by their uncle King Charles.Both women have their own careers, high-flying husbands and multi-million-pound homes elsewhere and are sure to face questions about why they could not pay their own way.Other revelations in the report were branded 'outrageous' last night. Shamed Mr Mountbatten-Windsor, it was disclosed, was allowed to let three properties on his leased Windsor estate – Royal Lodge – to staff and potentially pocket the profits.And he could be entitled to more than £300,000 in 'compensation' from the Crown Estate after being forced out of the Grade II-listed mansion over his friendship with Jeffrey Epstein several years before the end of his 75-year lease.Questions are also likely to be raised about the late Queen's cousins, Prince and Princess Michael of Kent, who have also enjoyed a long-term, sovereign-subsidised arrangement on their own lavish Kensington Palace apartment.