[1] During this campaign, Hurricanes outnumbered all other British fighters combined in service, and were responsible for shooting down 55 per cent of all enemy aircraft destroyed.

In 1945, Hawker Siddeley purchased Victory Aircraft of Malton, Ontario, Canada from the Canadian government, renaming the company A.V.

[2] Avro Canada underwent a major expansion through aircraft development and acquisition of aircraft engine, mining, steel, railway rolling stock, computers, electronics, and other businesses to become, by 1958, Canada's third largest company directly employing over 14,000 people and providing 45% of the parent company's revenues.

[3] During its operation, Avro Canada aircraft (built) included the C102 Jetliner, CF-100 Canuck, CF-105 Arrow and VZ-9- AV Avrocar.

[2] Other design projects (not built) included supersonic transport (SST) passenger aircraft, a mach-2 VTOL fighter, hovercraft, a jet engine-powered tank, and the hypersonic Space Threshold Vehicle.

[1] In the late 1950s, the British government 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.

The Hawker Siddeley Nuclear Power Company built and operated the 10 kW JASON reactor[5] in Langley, Berkshire (then in Buckinghamshire).

The reactor was in operation there from 1959 to 1962 and generated a total of 1.4 MWh[6] before being shut down and transported to the Royal Naval College in Greenwich, London.

[10] In the early 1970s, Hawker Siddeley's Canada Car and Foundry subsidiary began to build rapid transit vehicles for the North American market.

The heavy rail manufacturing business, based in Mississauga and Thunder Bay, Ontario, are now part of Alstom.

MBTA also bought a number of commuter rail coaches from the German firm Messerschmitt, thereby teaming Hawker Siddeley with its old World War II rival under the same organisation.

In 2006 the product line was sold to a new company to be known as Hawker Beechcraft, owned by Onex Partners and Goldman Sachs.