The 1947 National League Division One was the 13th season of speedway in the United Kingdom and the second post-war season of the highest tier of motorcycle speedway in Great Britain.
Harringay Racers rejoined the league. Wembley Lions retained the title. Belle Vue retained the National Trophy.
On account of the small number of teams in the league the British Speedway Cup was run in a league format. Wembley Lions won all their matches, home and away, to complete a double.
The 1947 National Trophy was the tenth edition of the Knockout Cup.
During the National Trophy quarter final match between Wembley and Harringay (on 15 August) the 27-year-old Wembley rider Nelson 'Bronco' Wilson received fatal injuries in the fourth heat. He died in the Prince of Wales Hospital, Tottenham, the following day from a fractured skull. Remarkably another rider Cyril Anderson of the Norwich Stars was killed instantly on the same evening, during the Division Two Best Pairs.
Qualifying Middlesbrough and Norwich qualified for the quarter finals by virtue of finishing 1st & 2nd in the Second Division Cup.
Quarterfinals
Semifinals
First leg
Second leg
Belle Vue were National Trophy Champions, winning on aggregate 116âÂÂ100.
Jack Parker won the British Riders' Championship final held at Empire Stadium on 11 September. Parker won the title after a run off and also broke the halfway (2 laps) track record (37.6 secs) in heat 2. There were three qualifying rounds, with 28 riders progressing to the Championship round, held over seven meetings.
First round
Semi final round
First leg
Second leg
New Cross won on aggregate 110âÂÂ105
Belle Vue
Harringay
New Cross
Odsal
Wembley
West Ham
Wimbledon