Across the UK the structure of smaller Regional Depots, Ordnance Support Units (OSUs), Training Materiel Parks, supply depots and Ammunition Sub-Depots was steadily run down. A reconfiguration in the late 1960s provided four Regional Depots (Thatcham, Hereford, Catterick and Stirling) and nine OSUs: Aldershot, Ashford, Burscough, Colchester, Feltham, Old Dalby, Thetford, Tidworth and Woolwich (which had been downgraded following the closure of the Royal Ordnance Factory and the sale of the old Dockyard). At the height of the Northern Ireland troubles Ordnance Depot Kinnegar was a major logistic facility but is now much reduced.