Florence Blenkiron, left, and Theresa Wallach on the BSA. Florence was the first woman to achieve 100mph at Brooklands, in 1933 when this photo is was made. Theresa also broke that barrier riding a Grindlay-Peerless.
A third woman also did the ton at Brooklands, the redoubtable Beatrice Shilling. She had an uncommon number of letters after her name which, had she been other than a woman, would likely have been preceded by Sir.
The following year Florence and Theresa embarked on a quite extraordinary journey from London to Capetown piloting a Panther with with sidecar and trailer.