 The races held on the Clypse Course during the period 1954–1959 were the more traditional full grid starts along with the 1924 Lightweight TT Race and Clubmen TT Races from 1948, which were also "mass-start" races.The current format is a "clutch start" and race competitors will be "started singly at 10-second intervals".Entrants must be in possession of a valid National Entrants or FIM Sponsors Licence for Road Racing.