Campaigners claim the current plans for the tunnel would breach one of the restricted covenants in the deeds from 1915 that were made part of the condition of the gift to the nation three years later. They said the document prevented building work within 400 yards (365m) of a milestone just north of the monument, and plans show the tunnel within about 375 yards (343m).

However, a spokesman for Highways England said their interpretation of the covenant only prevented building on the northern side of the site and only referred to above-ground construction.

 

Quick, quick, find a barrister and offer him a knighthood!