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Hawker Siddeley was a group of British manufacturing companies
1935 Hawker Siddeley Aircraft Co was formed as a public company to purchase Armstrong Siddeley Development Co and 50% of the shares in Hawker Aircraft Ltd , bringing together the 2 largest UK companies involved in manufacture of aircraft. The companies acquired included the automotive and engine builder Armstrong Siddeley Motors, the aircraft manufacturer Sir W. G. Armstrong Whitworth Aircraft, A. V. Roe and Co (Avro) and Air Training Services. The constituent companies continued to produce their own aircraft designs under their own name as well as sharing manufacturing throughout the group. Sir Thomas Sopwith was chairman of the new company.
WW2 Hawker Siddeley was one of the United Kingdom's most important aviation concerns, producing numerous designs including the famous Hawker Hurricane fighter plane that, along with the Supermarine Spitfire, was Britain's front-line defence in the Battle of Britain. During this campaign, Hurricanes outnumbered all other British fighters, combined, in service and were responsible for shooting down 55 percent of all enemy aircraft destroyed.
1945 Hawker Siddeley purchased Victory Aircraft of Malton, Ontario, Canada from the Canadian government, renaming the company, A.V. Roe Canada, commonly known as Avro Canada, a wholly owned subsidiary of Hawker Siddeley. During its operation, Avro Canada produced the Avro Jetliner, Avro CF-100 and CF-105 Arrow.
1948 The company name was changed to Hawker Siddeley Group. The aircraft division would become Hawker Siddeley Aviation (HSA) and the guided missile and space technology operations as Hawker Siddeley Dynamics (HSD).
1957 Hawker Siddeley purchased the Brush group of companies which included Brush Electrical Machines and Brush Traction who manufactured electromotive equipment and railway locomotives; the engine builder Mirrlees, Bickerton and Day was acquired as part of the Brush acquisition. Other railway engineering assets were acquired, including Westinghouse Brake and Signal Co. Brush Traction's Falcon locomotive was also known as HS4000 (Hawker Siddeley 4000 h.p. engine).
1957 Collaboration formed with John Brown and Co to apply nuclear power to marine propulsion, electrical generation and industrial applications . Hawker Siddeley John Brown Nuclear Construction was registered as a private company in September.
1958 In the late 1950s the British government had decided that, with the decreasing number of aircraft contracts being offered, it was better to merge the existing companies, of which there were about 15 surviving at this point, into several much larger firms. Out of this decision, came the "order" that all future contracts being offered had to include agreements to merge companies. Hawker Siddeley merged all its aviation interests into one division, Hawker Siddeley Aviation; these companies were Hawker, Avro, Gloster, Armstrong Whitworth and Armstrong Siddeley. The other part of the company was Hawker Siddeley Industrial Division which was formed to hold the industrial assets; this division had 4 main lines of business - electrical, engines, alloys and constructional engineering
1960 Hawker Siddeley Industries included:
1961 Hawker Siddeley Group was split into separate, autonomous divisions: aviation and industrial; it comprised 30 major manufacturing companies. Employed 90,000 persons. 
1961 Group consisted of 3 major operational units: HS Aviation, HS Industries and A.V. Roe Canada, plus subsidiaries in South Africa and Australia. Annual sales of £324 million, compared with £6 million 25 years earlier when the Group had been formed. Diesel engines were supplied by Petters, Mirrlees and National; electrical equipment by Brush Electric and Fuller as well as supply of Brush locomotives to British Railways.
After the cancellation of the Avro Arrow, the Canadian company began to unravel.
1962 A.V. Roe Canada was dissolved and the remaining assets were transferred to the now defunct Hawker Siddeley Canada. The heavy rail manufacturing business, based in Mississauga and Thunder Bay, Ontario, have been acquired by Bombardier Transportation.
1963 the names of the constituent companies were dropped, with products being re-branded as Hawker Siddeley or "HS". In this period, the company developed the first operational and most successful VTOL jet aircraft, the Harrier family. This aircraft remained in production into the 1990s and remains in service.
1968 Acquired Crompton Parkinson
1973 Hawker Siddeley acquired Aberdare Holdings including the industrial electronics firm South Wales Switchgear, Opperman Holdings, Washington Engineering, the power equipment division of Bowthorpe Holdings, the aluminium forging business of Alcan Booth Industries, William Aitkenhead. Decided to proceed with the new aircraft, the HS 146
On 29 April 1977, as a result of the Aircraft and Shipbuilding Industries Act, Hawker Siddeley Aviation (HSA) and Hawker Siddeley Dynamics (HSD) were nationalised and merged with British Aircraft Corporation (BAC) and Scottish Aviation to form British Aerospace (BAe). HSA and HSD accounted for only 25% of the Hawker Siddeley business by this time.
1980 The non-aviation and foreign interests were retained in a holding company known as Hawker Siddeley Group Plc after 1980. Subsidiary companies included:
The group was rationalised in the 1980s, focusing on railway engineering and signalling, industrial electronics and instrumentation and signalling equipment.
1981 Acquired a majority interest in Carlton Industries, principally for its car battery activities
1984 Hawker Siddeley acquired the remainder of the shares in Carlton
1989 Purchased GEC Small Machines Co.
1989 Hawker Siddeley acquired GEC Alsthom Electromotors with works at Bradford, Birmingham and Newcastle under Lyme
1991 Hawker Siddeley Group Plc was acquired by BTR.
Another company which retained the HS name is Hawker Siddeley Power Transformers. Orenda Aerospace, as part of the Magellan Aerospace Corporation, is the only remaining company from the Avro Canada / Hawker Siddeley Canada era, although greatly diminished in size and scope of operations.
The Hawker Siddeley name was not used to brand aircraft until 1963. For Hawker Aircraft Ltd. aircraft see Hawker Aircraft.
|Hawker Siddeley Aircraft|
|Hawker Siddeley Trident||1962||117||Jet Airliner originally the de Havilland D.H.121 and the Airco DH 121|
|Hawker Siddeley HS.125||1962||1,600+||Originated as the de Havilland DH.125. Military service as Dominie.|
|P.139B||AEW and COD aircraft project.|
|HS.141||-||0||V/STOL airliner project submission|
|HS.146||1981||387||Entered production and later renamed the BAe 146|
|HS 748||1960||380||Originated as Avro 748 turboprop airliner|
|Hawker Siddeley: Andover||1965||37|
|P.1127 / Kestrel||1960-4||The Hawker P.1127 and the Hawker Siddeley Kestrel FGA.1.|
|Hawker Siddeley: Harrier||1969||278||Developed into British Aerospace: Sea Harrier|
|P.1154||Cancelled.||Developed alongside the subsonic and smaller Hawker Siddeley P.1127/Kestrel, the P.1154 was derived from the P.1150.|
|Nimrod||1967||51||An extensive modification of the de Havilland Comet, the world's first operational jet airliner|
|Hawk||1976||1000+||Jet-powered advanced trainer aircraft first flown at Dunsfold, Surrey, in 1974 as the Hawker Siddeley Hawk, and subsequently produced by its successor companies, British Aerospace and BAE Systems, respectively.|
|Hunter||1954-2014||1,972||Transonic British jet aircraft developed in the late 1940s and early 1950s.|
|Hawker Siddeley Aircraft|