The 1931 Southern League was the third season of motorcycle speedway in the United Kingdom for Southern British teams, and its final season before amalgamation of the Southern and Northern Leagues. The Northern teams also had their third season known as the 1931 Speedway Northern League.
Both Birmingham teams based at Perry Barr and Hall Green had left the league but the latter did ride in the National Trophy.
Coventry returned mid-season to replace Leicester Stadium who were liquidated in late May.
Harringay Canaries resigned in June to be replaced by a Belle Vue team, who then rode both in the Northern and Southern Leagues, the latter as Manchester. Nottingham closed in July but they were not replaced and their results stood. The league season was the longest in the short history of the competition as teams met each other four times instead of twice.
The Wembley Lions won their second consecutive title finishing three points clear of 1929 champions Stamford Bridge. The league suffered a fatality during the match between Belle Vue and Wembley at Hyde Road. James Allen (known as Indian Allen) was thrown from his bike and hit his head on a fence, trying to avoid a rider who had fallen in front of him. He died three days later in hospital on 12 September 1931. Another rider Noel Johnson of Plymouth had been killed in a challenge match against Coventry reserves on 25 August.
* Harringay scored 12 points from 14 matches, Belle Vue scored 16 from 24 ** Leicester scored 1 point from 8 matches, Coventry scored 16 from 30
+ Awarded to Coventry
The 1931 National Trophy was the first edition of the Knockout Cup. It was contested between teams from the Southern and Northern Leagues.
First round
Second round
Quarterfinals
Semifinals
First leg
Second leg
Wembley were declared National Trophy Champions, winning on aggregate 120-69.
First round
Semi final round
First leg
Second leg
Crystal Palace won on aggregate 114âÂÂ76
Crystal Palace
Harringay (withdrew)
High Beech
Lea Bridge
Leicester/Coventry
Manchester (Belle Vue)
Nottingham
Southampton
Stamford Bridge
Wembley
West Ham
Wimbledon