Weslake Research and Development was founded by Harry Weslake, with premises in Rye, East Sussex, England. Weslake was a cylinder head specialist who had been instrumental in modifying the side valve standard engine used in the first SS (Swallow Sidecars - later to become Jaguar) sports car. He also worked on the larger SS engine: "The 2½-litre car has an o.h.v. power-unit with Weslake combustion chambers, and gives over 40 b.h.p. per litre." He also designed the cylinder head for the overhead valve version of the Austin 'A' series engine that was used in the Morris 1000 and the Mini and received royalties on each of these engines manufactured. He was involved in the design of every Jaguar engine up to and including the V12 of the early 1970s. Weslake was also involved in the development