According to Wikipedia, Sir William Lindsay Everard (1891-1949) was a brewer, politician, and philanthropist from Leicestershire, United Kingdom. As the founder and supporter of the Ratcliffe Aerodrome, Sir Lindsay was a pioneer aviator, knighted for his crucial efforts in World War II with the Air Transport Auxiliary (ATA). He controlled Everards Brewery for nearly 25 years and was a Member of Parliament.

His Inverted Jenny was displayed at the British Philatelic Exhibition in South Kensington from December 28, 1946 to January 4, 1947.

His Inverted Jenny was not included in the sale of his Air Mail collection in 1953, and must have been sold privately