He worked at the National Physical Laboratory (NPL) during World War II, and was a chairman of the British Engineering Metrology Association.
After the war, he was a leading exhibition dancer, and one of a small group of experts who introduced Latin American dance to Britain.
[1] After his education and upbringing in Scarborough, Wainwright joined the NPL, the largest applied physics laboratory in the UK, in 1939.
Later in life, when his active career as a dancer was over, Lyndon returned to metrology, working at the National Engineering Laboratory in East Kilbride, Scotland for four years, and then for seven years was head of quality control and metrology at PIRA, the Research Association for the Printing, Packaging and Paper Making Industries (formerly PATRA, the Printing Industry Research Association) in Leatherhead, Surrey.
In this capacity he lectured in the UK and abroad, and sat on committees of the International Association of Research Organizations in the Printing Industries.
Wainwright met his first wife, Felicia (14 April 1920 – September 1993), in 1940, and they soon started to train as a ballroom dance couple.
At their peak, they were presenting over 400 shows a year, often several times at different venues on a Sunday, and they also ran dance studios in Kingston, Ewell and Purley in Greater London.