A cannabis farm has been discovered inside a derelict cottage on land owned by Legoland Windsor theme park.

Up to 50 marijuana plants were found by workmen searching for asbestos on the site just three miles away from Windsor Castle.  The plants were found during “routine checks” by park staff on Monday.

They were being grown in a bungalow in a setup which included lights and watering equipment.

It is thought the building – outside of the park resort but on the theme park’s land – was accessed from nearby land owned by the Queen.

A 40-year-old man from Windsor and a 34-year-old man from Burnham have been arrested on suspicion of producing cannabis.

Thames Valley Police are currently on-site investigating the discovery of the plants and equipment. A police spokesman said: ‘Thames Valley Police officers were called at about 11.15am today following reports that cannabis had been found at a property in the Legoland grounds in Windsor.

A Legoland spokesperson said the building “appears to have been accessed via the Crown Estate”.

The arrested men have been bailed until 28 February.