In 1928 the International Six Days Trial (ISDT) was based in Harrogate. Allan who had formed a relationship with the Scott factory, based in Shipley, through riding in Trials quite successfully in the 20’s was awarded a place in the British team in the 1928 ISDTon a works Scott and won a gold medal, his first of six.
In 1932 Allan won the Scott Trial on a Scott, the first man to be best on observation and to set fastest time. This success raised him from notable rider to star all rounder. Most competition riders were all-rounder’s in those days, but Jefferies more than most, taking in hill climbs, trials, sand and road racing, and scrambles. By his mid twenties he had broken a lot of bones and a lot of records.
Allan won the Lancashire Grand National Scramble for Scott in 1933, but that year saw an even more important milestone in his life and in the history of the firm. At the Olympia Show he signed for Triumph's factory Trials Team, with a road racing option. More than that, he took on the agency for the Coventry firm's machines and Triumph became a name synonymous with Jefferies for decades.
Triumph, unlike many manufacturers, managed to keep afloat during the depression. The Jefferies family firm was in a position to take advantage of the new range, which under Edward Turner's reign became the Tiger 70, 80 and 90, launched in April 1936.