The Education/AV building located on the north eastern side of the inner bailey, to the east of Arthurs Hall is one of the buildings within the inner bailey that appear as a group of mid-18th-century barrack blocks with a reasonably homogenous character. It is likely however that this building originated in the C13th century as the porch to Arthurs Hall and associated service rooms and there are several areas of medieval masonry visible within the structure that reveal this former use. (location accurate to the nearest 1m based on available information)