Another major change which took place in English football during the second half of the 1980s was a restructuring of the divisions. During the 1986 close season, the Football League decided to reduce the First Division to 21 clubs for the 1987–88 season and finally to 20 clubs for the 1988–89 season, while the Second Division would be increased to 23 and finally to 24 clubs in the process. End-of-season promotion/relegation playoffs were introduced for these two transitional seasons, before the playoffs were established as promotion-only deciders from the end of the 1988–89 season onward, with the previously two-legged final being altered to a single match at Wembley from 1990 onward.