Britain's most expensive field was put up for sale for an astonishing £30 million.

Parkwood Estate is currently a 77 acre patch of open land but has planning permission to build a spectacular 33,000 sq/ft mansion.

The property would be 30 times the size of the average new home with ten bedrooms, a library, cinema, spa, staff accommodation and an indoor swimming pool.

After building the new home for around £15 million, it is thought the estate will be worth as much as £100 million potentially netting the owner a £50 million profit.

At this price, Parkwood Estate would be the most expensive private home outside of London and 384 times more than the average asking price of a house in England.

Parkwood Estate is nestled in the Green Belt near Windsor Great Park and has a picturesque lake, woodland and formal gardens. The site was bought by Candy and Candy in 2007, who obtained planning permission for a mansion. It was then sold to its current, private owner.

They have now decided to put the site on the market with joint agents Beauchamp Estates and Grosvenor Billingshurst.