National League (1932–1964)

[1] When league racing resumed after World War II, there was initially a single division.

[1] For several reasons, including the levels of Entertainment tax and competition for audiences from television, a number of teams ceased to be profitable and the league reverted to two divisions in 1954.

[1] Further withdrawals led to a reduction to a single eleven-team division in 1957.

[1][2] Continuing reduction in spectator numbers, and dissatisfaction with the way speedway was structured and managed led several promoters (including Mike Parker, Reg Fearman, and Johnnie Hoskins) to create the breakaway Provincial League in 1960.

[1] Working within tighter budgets, they were nevertheless more successful commercially than the National League promotions.