It is due to be completed in 2019 - if it can achieve planning permission and regulatory approval and will be used by Tintagel Castle's (above) 200,000 annual visitors

'Together, they breathe an undeniable and powerful sense of life into the place - to be invited to contribute to that is a rare privilege and honour.'

Other plans for the site by English Heritage for further King Arthur attractions at the castle have attracted controversy.

A group known as 'Kernow Matters To Us' expressed outrage when Merlin the Magician's face was recently engraved at the entrance to a rocky inlet near the castle.

English Heritage was criticised for 'tampering' with Cornish History by trying to turn Tintagel Castle into a 'fairytale theme park' based on the legend of King Arthur.

A group of local historians accused the organisation of combining history with fantasy to promote its link with the king in a bid to drum up visitor numbers.

The Cornwall Association of Local Historians, which has 200 members, said it was horrified that the head of the wizard Merlin has already been carved into a rock face at the medieval site.

English Heritage has been criticised for 'tampering' with Cornish History by trying to turn Tintagel Castle into a 'fairytale theme park' based on the legend of King Arthur