Hawker Siddeley Aviation Ltd
Formed in 1935 as a public company from the purchase of Armstong Siddeley Development Co and 50% of the shares in Hawker Aircraft Ltd. The company was called Hawker Siddeley Aircraft Co.
In 1948, the company was renamed 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).