The Queen is facing a million-pound black hole in her estates’ finances after Brexit which has caused consternation among royal aides.

The Queen’s country retreat in Norfolk, will lose close to £700,000 a year when EU farming subsidies end while the farms near Windsor Castle will be around £300,000 down.

Prince Charles’s estates are also facing a funding cut from Brexit of £100,000 a year while the Crown Estate – which manages Royal land – will also be hit.

It comes amid wider fears about how the Crown Estate is being impacted by Brexit.

It is understood there were concerns about whether demand for stores on Regent’s Street and other parts of London owned by the Crown would drop after a vote for Brexit.

All revenue made by the Crown Estate goes to the Treasury, with 15 per cent of the taking shared to the Royal Family through a yearly Sovereign Wealth Fund.