via Press Association

Prince William has turned 25 and becomes entitled to part of the inheritance left to him by his mother Diana, Princess of Wales.

The second in line to the throne gains access to the income accrued on the £6.5 million he was left in the Princess’s will.

But sources said that the future King will, for now, not touch the money – estimated by financial experts to be between £250,000 and £300,000 a year.

When Diana died a decade ago, she left an estate of £21 million. More than £8 million was paid in inheritance tax, leaving £12,966,022. It was split equally between William and younger brother Prince Harry, leaving them around £6.5 million each.

Following investment, this is estimated to have grown to around £9 million.

Changes agreed to the will in December 1997 meant that, upon reaching 25, William and Harry are entitled to the whole of the income of their share. Before the age of 25, income can be paid at the trustees’ discretion.

The trustees can pay over capital at any time, but when the Princes turn 30, they can ask for their share of the capital in full. A Clarence House spokesman said: “We don’t discuss Prince William’s private financial arrangements.”

William will spend his birthday training with the Army at Lulworth in Dorset. He already earns around £22,000 as a Cornet in the Blues and Royals and receives money from the Prince of Wales from the Duchy of Cornwall which pays for his accommodation, staff and polo playing.

He is also believed to have access to funds left in trust for him by his great-grandmother the Queen Mother.

The Princess’s estate was made up of stocks and shares, jewellery, her multi-million-pound divorce settlement, dresses and personal items from Kensington Palace.