I was landlord of the Thurland Hall pub on Thurland St from 1986 until 1992, We had a deep cellar and then 2 floors of caves below that cellar. The caves were WAY old, and were bricked up in parts, where they had originally gone under Thurland Street, to link, presumably with the cave network under Nottingham. We found hay and straw down there, perfectly preserved, which the experts said belonged to the time when Charles I lodged there, with his entourage of several hundred men and horses.When they did the "cut and cover" tunneling under Thurland St, the Victorian brickies must have thought ".