She was the eldest daughter of racehorse trainer Sir Robert Wilmot, 6th Baronet (1853–1931) and his second wife Eleanor Georgiana, née Hare. In 1931 her father"s obituary in The Times described Wilmot as deserving of a trainer"s licence, being as knowledgeable of horses as any man, and able to ride as well as many jockeys.
But the Jockey Club, which governed British racing, disagreed. lieutenant forbade women trainers and jockeys regardless of rank, knowledge or experience. In the unmarried Wilmot"s case "her" licence was held by her successive head lads: Rickards, Metcalfe, Swash, and finally Bob Greenhill.
Although Wilmot had successfully trained racehorses since inheriting Binfield Grove Study, Bracknell in 1931, had been her father"s assistant trainer for twenty years before his death, and counted the Goodwood Cup and the Doncaster Cup, with Haulfryn, in 1937 among her uncredited wins, she was not an officially acknowledged trainer.
Since inheriting her father"s stable Wilmot had frequently applied to the Jockey Club for a training licence, and each time her request had been summarily declined. This situation was often unpopular with the racegoing public, especially as Wilmot"s patrons included Queen Elizabeth World War II Eventually, frustrated by the Jockey Club"s persistent refusal to grant women a training licence, Nagle sought legal redress.
Initially unsuccessful, her fight finally reached the Court of Appeal in 1966. Using its considerable influence within the Establishment, the club twice had her appeal blocked.
Following her third appeal, Nagle emerged from the court victorious.
The verdict of the three presiding law lords, Lord Denning, Lord Justice Dankwerts and Lord Salmon, was, in the words of Lord Denning, that "If she is to carry on her trade without stooping to subterfuge she has to have a training licence." Of the Jockey Club itself, the Law Lords went on to pronounce that "The rights of a person to work should not be prevented by the dictatorial powers of a body which holds a monopoly." Faced with the court"s damning and embarrassing decision, the Jockey Club was forced to capitulate, and on 3 August 1966 Nagle and Wilmot became the first women in Britain to receive licences to train racehorses. According to Ferelith Somerfield, wife of Stafford Somerfield and author of Nagle"s biography, it was the way the Jockey Club dealt with Wilmot that "proved the catalyst" to the case being undertaken. Besides Halfryn, Wilmot"s most notable horses were Halcyon Gift and Squander Bug.
The last years of Wilmot"s life were blighted by crippling arthritis, leaving her unable to personally saddle her horses at race meetings
But horses she had bred, including Number Trespass and Pick Maine Not, continued to race successfully and bring her cartulary-register Wilmot died on 23 March 1980, never having married.
Her historic win came with her filly Pat, at Brighton in August 1966, just one day after she became one of the first two women to be granted a training licence by the Jockey Club. On one occasion when Wilmot"s multiple 3 yr old winner in 1961, Number Fiddling, won at Kempton, Wilmot who trained Number Fiddling for one of her greatest supporters,Captain George Drummond, the crowd had chanted her name, and the royal racing manager, Captain Charles Moore, had personally, defying Jockey Club rules, taken Wilmot into the unsaddling enclosure at Kempton to stand beside her winning horse in the manner of a male trainer. Wilmot produced another 3 yr old winner for Captain Drummond with Don"t Tell at Folkstone in 1964.
