In 1926 the western part of the site was sold to the Royal Arsenal Co-operative Society; the Co-Op still occupies a number of buildings on the site. The older, eastern portion of the site remained in Ministry of Defence hands, used for storage, workshops and offices, until the closure of the Royal Arsenal in the 1960s. (The Royal Electrical and Mechanical Engineers, one of the last military units on site, moved out in 1966, taking with them the muster-bell and mast that had stood inside the main gate; it was re-erected at their depot at Arborfield, where it was rung for church services; in 2016 it was scheduled to move with the corps to their new headquarters at MoD Lyneham.)
