Winifred's brothers, Tony and Frank, had leased farmland and stables near Folly Court in Wokingham, Berkshire, where they schooled and sold polo-ponies, hunters and steeplechasers.

[6] There was a field on the farm big enough upon which to land a light aircraft, so Winifred built a wooden hangar and moved her Moth from Stag Lane.

In July 1928 she took the 3rd place in the seventh King's Cup Race and won the Siddeley Trophy as the first Aeroplane Club aviator to cross the line, flying DH.60 Cirrus I Moth.

In 1930 she was a member of the British team at the International Tourist Plane Contest Challenge 1930 between 16 July and 8 August in Berlin, Germany, finishing the rally seventh overall in her De Havilland Gipsy Moth.

After 16 hours, while Captain Edwards was flying the aircraft and Winifred was asleep, the plane crashed into the sea off the coast of Belmonte Calabro in complete darkness.

As Captain Edwards was quite badly injured, Winifred left him sitting on the wooden fuselage and swam ashore "6 strokes at a time"; the ditching was about two miles offshore.

[8] In 1931, she took the fifth place in the King's Cup Race and became the first British woman to earn her living as a private owner's personal pilot, flying the air racer and MP, Sir William Lindsay Everard, all over Britain, Europe, Turkey and the Middle East.

Unfortunately, because of thick fog, the specialist lost his way and the oxygen he was bringing, which might have saved her life, arrived too late: Spooner suffered a heart attack, and, despite an injection of strychnine, died the next day, on 13 January.

Shelmerdine, Director of Civil Aviation; Lady Acton and Kathleen Countess of Drogheda representing the Women's Committee, Air League.

A bronze bust of Spooner, created by Donald Gilbert, was unveiled on 30 May 1934 by Lindsay Everard MP at the headquarters of the Women's Automobile and Sports Association, presented by an anonymous donor.