Relegation to the Football League Third Division was in place in the season before the latter even started, as Grimsby Town (last place in 1919–20) made way for Cardiff City and formed the new Third Division with southern clubs. For subsequent seasons, two clubs were relegated into either the Third Division North or Third Division South depending on their geographical location. When the Third Division was reunified in 1958–59, the relegation arrangement was kept; a third club began being relegated in 1974.