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The Civilian Repair Organisation (CRO) was a special group in Britain during World War II. It was created in 1939 to fix and maintain military aircraft. Civilian companies and workers did this important job. The CRO helped keep Britain's planes flying during the war.

It's important not to confuse it with another group called the Civil Repair Organisation. That group did similar work for Britain's Air Ministry in India from 1943 to 1945.

How the Civilian Repair Organisation Helped in World War II

Starting the CRO: A Wartime Idea

After World War II began, Britain needed a way to repair its military planes quickly. So, on September 11, 1939, the first Civilian Repair Unit (CRU) was set up. It was located at the Cowley works of Morris Motors. Civilians worked there, managed by the Air Ministry.

On October 6, 1939, Sir Kingsley Wood, who was in charge of the Air Ministry, made an important appointment. He chose William Morris (Lord Nuffield) to lead the new Civilian Repair Organisation (CRO). Lord Nuffield was already a famous car maker. He had also been in charge of a "shadow factory" at Castle Bromwich that built aircraft.

The main office for the CRO was set up at Magdalen College, Oxford. Later, on May 14, 1940, the CRO moved under the control of a new government department. This was the Ministry of Aircraft Production, led by Lord Beaverbrook.

How Aircraft Were Repaired

The No.1 CRU at Cowley got extra help from the No.1 Metal and Produce Recovery Depot (MPRD). This depot was right next to the Cowley works. It helped to reclaim materials from damaged planes.

A support team, No.50 Maintenance Unit (MU), was also based at Cowley. Their job was to move damaged aircraft and parts to the CRU. They also took non-repairable parts and scrap to the MPRD for recycling. These Maintenance Units were part of the RAF Maintenance Command.

IWM-L94 Swordfish repair 205196340
Civilian workers fixing the wing of a Fairey Swordfish aircraft during the war.

Many civilian companies helped the CRO. These were often businesses that already built or repaired aircraft in the UK. Other companies from engineering and woodworking also joined in.

Aircraft repairs often happened in different factories spread out across the country. Once fixed, the parts or whole planes were sent to airfields. There, they were put back together and tested. After testing, they were returned to the RAF units.

For small repairs, planes could even fly directly to a CRO company at an airfield. They would be fixed quickly and could fly out the next day. These fast repairs were known as "Fly In" repairs.

Amazing Results: The CRO's Impact

Between May 1940 and July 1945, the Civilian Repair Organisation did incredible work. They returned a total of 79,000 aircraft to active service. This meant these planes could fly and fight again.

By July 1945, a large number of the RAF's heavy aircraft had been repaired by the CRO. About 36.5% of them, which was 3,285 planes, had gone through the CRO's repair process. The CRO continued its important work for several years even after World War II ended.

List of firms participating in the CRO

Principal ref: Sturtivant 2007

Company Locations Work
Air Dispatch Ltd. Cardiff Repair Audax, Hawker Hart, Hector, Henley, Hind, Westland Lysander, Potez, Wicko; parts of Wellington;
Vengeance modifications
Air Service Training Ltd Exeter, Hamble Repair Airacobra, Handley Page Hampden, Mustang, Seafire, Spitfire; parts of Spitfire;
Mosquito modifications
Airspares Ltd Hyde Remove parts from crashed aircraft, for reuse.
Airspeed (1934) Ltd. Christchurch, Portsmouth Repair Airspeed Oxford
Air Taxis Ltd Altrincham, Barton, Middleton Repair Anson, Dominie
Airtraining (Fair Oaks) Ltd. Fair Oaks Repair Bristol Beaufighter, Beaufort, Blenheim
Airtraining (Oxford) Ltd. Kidlington Repair Hawker Hurricane
Airwork General Trading Co. Ltd. Gatwick, Loughborough, Renfrew, Staverton Repair Avro Anson (S), Battle, Blenheim, Douglas Boston (L), Havoc, Lancaster parts, Lysander, Oxford, Spitfire, Tomahawk, Wellington, Whitley (G);
Wellington conversions
Albany Sheet Metal & Engineering Co. Ltd. Oldham Repair Beaufighter, Blenheim; parts of Mosquito
Anchor Motors Co. Ltd. Chester Parts of Wellington
A.P. Aircraft Ltd. Coventry Parts of Blenheim
Sir W.G. Armstrong Whitworth Aircraft Ltd. Coventry Repair Armstrong Whitworth Whitley
Atlantic Coast Airlines Ltd. Barnstaple Repair Anson, Falcon, Fox Moth, de Havilland Hornet Moth, Hawker Hotspur, Lysander, Magister, Martinet, Mentor, Proctor, Tiger Moth, Tutor, Whitney Straight
Austin Motor Co. Ltd. Cofton Hackett, Elmdon, Marston Green Repair Battle; parts of Short Stirling
A. V. Roe & Co. Ltd. Bracebridge Heath, Chadderton, Langar, Ringway, Waddington, Woodford, Yeadon Repair Anson, Avro Lancaster, Avro Manchester; parts of Lancaster; Anson modifications, Manchester modifications
J.Berry & Sons Ltd. Sywell Parts of Blenheim, Hotspur, Oxford; Master modifications
Blackburn Aircraft Ltd. Abbotsinch, Sherburn Repair Blackburn Shark, Blackburn Skua, Fairey Swordfish; parts of Firebrand, Short Sunderland; Skua mods
Boulton & Paul Aircraft Ltd. Wolverhampton Repair Wellington; parts of Blackburn Roc; Wellington modifications
Bristol Aeroplane Co. Ltd. Weston-super-Mare, Whitchurch Repair Beaufort, Blenheim, Bombay; parts of Supermarine Sea Otter, Sunderland, Wellington
Brooklands Aviation Ltd. Doncaster, Northampton, Sywell Repair Wellington; parts of Lancaster
Brush Coachworks Ltd. Loughborough Repair Hampden; parts of Hereford
Burtonwood Repair Depot Great Sankey Repair Buffalo; mods, repair & overhaul various USAAC aircraft
Campbell Engineering Ltd. Bromley Salvage
Cunliffe-Owen Aircraft Ltd. Eastleigh, Macmerry, Marwell, Silloth, Southampton Repair Fairey Albacore, Blenheim, Boston, Cleveland, Henley, Lockheed Hudson, Tomahawk, Hawker Typhoon, Vultee Vengeance, Lockheed Ventura
John Curran Ltd. Cardiff Repair Beaufighter, Blenheim, Martinet
de Havilland Aircraft Co. Ltd. Hatfield, Leavesden, Witney DH.82 Queen Bee, DH.86B; parts of Miles Magister
Dobson & Barlow Ltd. Samlesbury Repair Halifax, de Havilland Vampire
Entwistle & Kenyon Ltd. Accrington Parts of Albemarle, Beaufighter, Beaufort, Blenheim, Stirling, Tiger Moth, Wellington
Fairey Aviation Ltd. Hamble, Hayes, Heaton Chapel, Ringway Repair Albacore, Anson, Fairey Battle, Seafox, Swordfish; parts of Albacore, Fairey Firefly, Fairey Fulmar, Gordon, Halifax, Spearfish, Swordfish; Fulmar mods
Fairfield Aviation Ltd. Odham's Press (Watford), Elstree Repair Audax, Hart, Hector, Hind, Lysander, Master, Wellington
Field Consolidated Aircraft Services Ltd. / Rollason Aircraft Services Ltd. Croydon, Hanworth, Tollerton Repair Beaufighter, Beechcraft, Eagle, Hampden, Harrow, Hereford, Hudson, Hurricane, Oxford, Wellington; modifications to Horsa, Oxford, Wellington; parts of Albemarle, Audax, Battle, Demon, Hampden, Hereford, Hurricane, Oxford, Proctor, Wellington
Folland Aircraft Ltd. Hamble Parts for Beaufighter, Beaufort, Spitfire
General Aircraft Ltd. Hanworth Repair Argus, Beaufighter, Beaufort, Blenheim, Blenheim, Hotspur, Hoverfly, Hurricane, Mustang, Spitfire
Gloster Aircraft Co. Ltd. Hucclecote, Staverton, Stoke Orchard Repair Henley, Gloster Meteor; parts of Gloster Gladiator
Green Bros Maintenance & repair of target aircraft
Handley Page Ltd. Cricklewood, Radlett Repair Hampden, Harrow, Heyford; parts of Halifax
Handley Page Ltd. York Aircraft Repair Depot [YARD] Repair Halifax; Halifax modifications
Hawker Aircraft Ltd. Brooklands, Kingston upon Thames, Langley Repair Hart, Hind, Hurricane, Tempest, Typhoon
Helliwells Ltd. Walsall Repair Harvard, Hurricane; Harvard modifications
Herts and Essex Aviation Ltd. Broxbourne Repair ATC gliders, Avro Commodore, Desoutter, Magister, Proctor, Puss Moth, Q-6, Taylorcraft, Vega Gull, Whitney Straight
Heston Aircraft Co. Ltd. Harmondsworth (Penguin factory), Heston Repair Spitfires
HTP Motors Ltd Truro, Cornwall Repair Spitfires
Lancashire Aircraft Corp Ltd. Burnley, Samlesbury Repair Beaufighter, Beaufort
William Lawrence & Co. Ltd. Colwick Parts of Anson, Hotspur, Tiger Moth
London Midland & Scottish Railway Ltd. Barassie, Derby, Wolverton Repair Hampden, Hereford, Lancaster, Spitfire, Whitley
London Passenger Transport Board Chiswick Parts of Halifax
Marshalls Flying School Ltd. Teversham Repair Albemarle, Anson, Fortress, Gladiator, Harvard, Master, Mosquito, Oxford, Typhoon, Whitley; parts of Anson, Fortress, Gladiator, Hart, Magister, Master, Oxford, Whitley; overhaul Dakota, Mosquito
Martin Hearn Ltd. Hooton Park,
Little Sutton
Repair Anson, ATC gliders, Mosquito
T. McDonald & Sons Balado Bridge, Kirkcaldy Repair Blenheim, Boston, Fulmar, Hudson, Lodestar, Mustang, Tomahawk; parts of Dakota, Stirling, Sunderland, Ventura
Morris Motors Ltd. Cowley Repair Hurricane, Magister, Master, Spitfire; parts of Tiger Moth
Morrisons Engineering Co. Ltd. Horsey Toll Repair Hurricane; parts of Wellington
Wm. Mumford Ltd. Billacombe Parts of Blenheim
Newbarn Engineering Co. Ltd. Rochdale Parts of Beaufort
Norbury Joinery & Cabinet Works Ltd. Norbury Repair Horsa, Hotspur
North Eastern Aircraft Components Ltd. Gateshead Parts of Boulton Paul Defiant, Oxford
Papworth Industries Ltd. Papworth Everard Repair ATC gliders
Park Ward Co. Ltd. Willesden Parts of Magister, Master
Parker Knoll Ltd. High Wycombe Repair Hotspur
Parnall Aircraft Ltd. Yate Repair Hendy Heck
George Parnall & Co. Ltd. Fishponds Parts of Beaufighter, Beaufort
Percival Aircraft Ltd. Luton Repair Vega Gull, Q-6
Phillips & Powis Aircraft Ltd. / Miles Aircraft Ltd. Woodley Repair Magister, Mentor
Pilkington Bros. Ltd. Kirk Sandall Parts of Halifax
Portsmouth Aviation Ltd. Farlington, Portsmouth Repair Envoy, Kirby Cadet, Oxford, Puss Moth; parts of Courier, Horsa, Master; Barracuda mods
Pressed Steel Co. Ltd. Cowley Parts of Typhoon
Redwing Aircraft Ltd. Croydon, Thornton Heath, Wolverhampton Repair Blenheim, Lysander, Wallace; parts of Battle, Beaufighter, Beaufort, Blenheim, Defiant, Halifax, Hurricane, Tempest, Typhoon, Wellington
Reid & Sigrist Ltd. Desford Airacobra, Defiant; parts of Harvard, Mitchell
Rollason Aircraft Services Ltd. Croydon Repair Audax, Battle, Demon, Gladiator, Hampden, Harrow, Hart, Hereford, Hurricane, Oxford
Rolls-Royce Ltd. Hucknall Repair Beaufighter, Hurricane; Hurricane conversions
Rootes Securities Ltd. Blythe Bridge, Meir, Shawbury, Speke Repair Blenheim; parts of Halifax
David Rosenfield Ltd. Barton Repair Battle, Fulmar, Hurricane
Saunders-Roe Ltd. Cowes Repair Lerwick, London, Stranraer, Walrus
Scottish Aviation Ltd. Doncaster, Edzell, Greenock, Hendon, Macmerry, Melton Mowbray, Merryfield, Prestwick, Silloth Repair ATC gliders, Battle, Catalina, Lerwick, Liberator, London, Oxford, Proctor, Roc, Skua, Spitfire, Stranraer, Sunderland; parts of Queen Bee
Scottish Motor Traction Co. Ltd. Edzell, Merryfield Repair Corsair, Hellcat, Hudson; parts of Dakota
SEBRO Ltd. Bourn, Cambridge Repair ATC gliders, Bv.222, R3O, Sunderland; parts of Singapore; mods of Short C-class, Hereford, Seafire, Stirling;
Short Bros (Rochester & Bedford) Ltd. Rochester,
South Marston, Swindon
Repair Singapore, Sunderland; parts of Queen Bee, Seaford; Sunderland mods
Short & Harland Ltd. Belfast Parts of Stirling, Sunderland
Shrager Bros Ltd. Edmonton,
Old Warden
Repair Desoutter, Heston Phoenix, Leopard Moth, Magister, Proctor, Q-6, Vega Gull, Whitney Straight; mods for Harvard, Mustang
Slingsby Sailplanes Ltd. Kirbymoorside Repair Hadrian, Hengist
Southern Aircraft (Gatwick) Ltd. Gatwick, Tinsley Repair ATC gliders, Battle, Blenheim, Expeditor, Fairchild, Harvard, Hornet Moth, Moth Minor, Puss Moth, Reliant, Tiger Moth, Vega Gull; parts of Argus, Corsair, Spitfire, Vigilant, Wellington
SS Cars Ltd. Bishop's Tachbrook, Coventry Repair Whitley; parts of Wellington, Whitley
Supermarine (Vickers-Armstrongs) Ltd. Woolston Repair Spitfire, Walrus; parts of Stranraer
Surrey Flying Services Ltd. Hamsey Green, Sanderstead Repair Audax, Battle, Hart, Hornet Moth, Magister, Monospar, Phoenix, Puss Moth
James H. Sutcliffe & Son Ltd. Todmorden Parts of Halifax, Hotspur, Oxford, Tiger Moth
Taylorcraft Aeroplanes (England) Ltd. Mountsorrel, Rearsby, Syston, Thurmaston Repair Auster, Harrow, Hurricane, Taylorcraft, Tiger Moth; parts of Wellington
Tollerton Aircraft Services Ltd. Tollerton Repair Hampden, Harrow, Hereford, Lancaster, Liberator, Manchester
Vickers-Armstrongs (Aircraft) Ltd. Brooklands Repair Wellesley, Wellington; parts of Blenheim
Vickers-Armstrongs Ltd. Chester Repair Wellington
Vickers-Armstrongs Ltd. Blackpool Repair Wellington
Vickers-Armstrongs Ltd. Castle Bromwich Parts of Spitfire
J.W. Walker & Sons Ltd. Ruislip Unknown
Wallows (Walsall) Ltd. Walsall Parts of Blenheim, Halifax, Hurricane, Mustang, Wellington
Western Airways Ltd. Weston-super-Mare Repair Anson, ATC gliders, Cub, Mohawk, Swallow, Tomahawk
Westland Aircraft Ltd. Ilchester, Yeovil Repair Lysander, Welkin
Wrightways Air Services Ltd. Eccles Repair Q-6, Scion
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