The partnership dates back to separate manufacturing and technology agreements with Agusta (Bell 47 and Bell 206) and as a sublicence via Agusta with Westland (Bell 47).
In December 1946 an agreement was signed between Westland Aircraft and Sikorsky to allow a British version of the S-51 to be manufactured under license in the United Kingdom.
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The Westland WS-51 Dragonfly helicopter was built by Westland Aircraft and was a license-built version of the American Sikorsky S-51.
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The initial BERP rotor blades were developed in the late 1970s to mid-1980s as a joint venture programme between Westland Helicopters and the Royal Aircraft Establishment, with Professor Martin Lowson as a co-patentee.
The Squadron reformed at Hatfield on 17 February 1941 from No. 1 Anti-Aircraft Calibration Flight with Westland Lysanders.
The Westland Yeovil was a British biplane bomber designed and built by Westland Aircraft in 1923 to meet an Air Ministry Specification for a single-engined day bomber.
An additional 550 were manufactured by licensees of the helicopter including Westland Aircraft, the SNCASE in France and Mitsubishi in Japan.
The Westland affair, a 1986 British political crisis stemming from the government's ownership of Westland Aircraft