It is the kind of juxtaposition that can stop you short, the ordinary business of a weekly shop conducted directly above ground that once received the bodies of those who died, or were buried, in circumstances that remain only partially understood.

Archaeological excavations carried out in 2005 uncovered three burials and a quantity of disarticulated bone, meaning bones no longer connected in their original anatomical arrangement, sometimes indicating that a burial ground had been disturbed or reused over time. The minimum number of individuals represented across all the material was nine, of whom at least four were male and one female. A radiocarbon date obtained from one of the burials placed it between 1306 and 1425 AD, which points towards an association with a medieval building immediately to the east, identified as a possible prison constructed during the reign of Edward I, who ruled from 1271 to 1306. That building still stands, though its full history is not well documented. The excavators were unable to establish the complete extent of the burial ground, meaning further burials almost certainly remain beneath the site. Whether those interred here were prisoners who died in custody, or individuals connected to the facility in some other capacity, is not known. The reference is Lalonde's 2007 report, which records the finds at pages twelve to fourteen, but the questions it raises are larger than the answers it provides.