She dominated women’s cycle racing in the UK, winning more than 90 domestic championships and seven world titles, and setting numerous national records. She set a women's record for the 12-hour time-trial which exceeded the men's record for two years.
In 1967, she set a new 12-hour time trial record of 277.25 miles - a mark that surpassed the men’s record of the time by 0.73 miles and was not superseded by a man until 1969. While setting the record she caught and passed Mike McNamara who was on his way to setting the men's record at 276.52 miles and winning that year's men's British Best All-Rounder. She is reputed to have given him a liquorice allsort as she passed him. Apparently, McNamara ate the sweet.
She also set about 50 new national records at 10, 15, 25, 30, 50 and 100-mile distances; her final 10, 25 and 50-mile records each lasted 20 years before being broken, her 100-mile record lasted 28 years, and her 12-hour record still stands today. Her prowess led to the rare distinction, for a woman, of an invitation to compete in the Grand Prix des Nations in 1967.