List of ROC Group Headquarters and UKWMO Sector controls

This is a list of the locations for former Royal Observer Corps (ROC) Group Headquarters and the United Kingdom Warning & Monitoring Organisation sector controls that received information from ROC posts by dedicated GPO/BT landlines. Clusters of posts also had VHF radio communications with HQs and sector controls, in case of land-line failure, from the cluster Master Posts.

The Royal Observer Corps was a civil defence organisation operating in the United Kingdom between 29 October 1925 and 31 December 1995, when the Corps' civilian volunteers were stood down. (ROC headquarters staff at RAF Bentley Priory stood down on 31 March 1996). Composed mainly of civilian spare-time volunteers, ROC personnel wore a Royal Air Force (RAF) style uniform and latterly came under the administrative control of RAF Strike Command and the operational control of the Home Office. Civilian volunteers were trained and administered by a small cadre of professional full-time officers under the command of the Commandant Royal Observer Corps; latterly a serving RAF Air Commodore.

ROC Group Headquarters

 * ROC Group No 1 - Maidstone
 * ROC Group No 2 - Horsham
 * ROC Group No 3 - Oxford
 * ROC Group No 4 - Colchester
 * ROC Group No 5 - Watford
 * ROC Group No 6 - Norwich
 * ROC Group No 7 - Bedford
 * ROC Group No 8 - Coventry
 * ROC Group No 9 = Yeovil
 * ROC Group No 10 - Exeter
 * ROC Group No 11 - Truro
 * ROC Group No 12 - Bristol
 * ROC Group No 13 - South Wales
 * ROC Group No 14 - Winchester
 * ROC Group No 15 - Lincoln - (RAF Fiskerton)
 * ROC Group No 16 - Shrewbury
 * ROC Group No 17 - North Wales (RAF Wrexham)
 * ROC Group No 18 - Leeds
 * ROC Group No 20 - York
 * ROC Group No 21 = Preston (Goosnargh)
 * ROC Group No 22 - Carlisle (RAF Carlisle)
 * ROC Group No 23 - Durham
 * ROC Group No 24 - EDINBURGH (RAF Turnhouse)
 * ROC Group No 25 - Ayr
 * ROC Group No 27 - Oban
 * ROC Group No 28 - Dundee
 * 1953 - 1964 Barnton Quarry
 * 1964 - 1976 School Hill, Aberdeenshire
 * ROC Group No 29 - Aberdeen
 * ROC Group No 30 - Inverness
 * ROC Group No 31 - Belfast (Thiepval Barracks)

UKWMO Sectors and groups

 * Metropolitan sector
 * 1 Group - Maidstone (group headquarters at Ashmore House, Maidstone)
 * 2 Group - Horsham (sector headquarters)
 * 3 Group - Oxford (peactime national headdquarters)
 * 4 Group - Colchester
 * 14 Group - Winchester
 * Midlands sector
 * 6 Group - Norwich (group headquarters at Old Catton)
 * 7 Group - Bedford
 * 8 Group - Coventry (group headquarters at Lawford Heath)
 * 15 Group - Lincoln (group and sector headquarters at RAF Fiskerton)
 * 20 Group - York (group headquarters at Acomb)
 * Southern sector
 * 9 Group - Yeovil
 * 10 Group - Exeter (group headquarters at Poltimore Park)
 * 12 Group - Bristol (group and sector headquarters at Lansdown, Bath)
 * 13 Group - Carmarthen
 * Western sector
 * 16 Group - Shrewbury
 * 17 Group - Wrexham (group headquarters at RAF Wrexham)
 * 21 Group - Preston (sector headquarters - wartime national headquarters)
 * 22 Group - Carlisle (group headquarters at RAF Carlisle)
 * 31 Group - Belfast (group headquarters at Thiepval Barracks)
 * Caledonian sector
 * 24 Group - Edinburgh (group headquarters at RAF Turnhouse)
 * 25 Group - Ayr
 * 28 Group - Dundee (group headquarters at Craigiebarns)
 * 29 Group - Aberdeen (group headquarters at Northfield)
 * 30 Group - Inverness (group headquarters at Raigmore)