The site and the Great Hall are extensive, and the writer Geoffrey Ashe argued in an article in the journal Speculum that it was the base for the Arthur of history.
Ashe has also helped demonstrate, through acting as secretary to a dig undertaken by Dr. Ralegh Radford in 1966-70, that Cadbury Castle in Somerset, identified as Camelot by the sixteenth-century antiquary John Leland, was actually refortified in the latter part of the fifth century, in works as yet unparalleled elsewhere in Britain at the time.
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This was a characteristic of Vespasian's campaign in the region; there was military occupation at Cadbury Castle in Somerset, Hembury in Devon, and Hodd Hill in Dorset.
It is worth noting that although Cadbury Castle was of GWR design, she only served with BR, as she was built 2 years after the railways were nationalised.