The 1990 National League was the 16th since its establishment as a second tier in 1975, a renamed British League Division Two, and the last before it was again renamed British League Division Two.
The league was initially supposed to run with 18 teams - however, Mildenhall Fen Tigers were unable to form a team to the 42-point minimum average limit, and were expelled on March 22, 1990. Matches were once again run over a 16-heat formula, with seven riders per team.
Poole Pirates were again champions, and stepped up into British League Division One for the 1991 season.
<small>M = Meetings; W = Wins; D = Draws; L = Losses; F = Race points for; A = Race points against; Pts = Total Points</small>
The 1990 National League Knockout Cup was the 23rd edition of the Knockout Cup for tier two teams. Poole Pirates were the winners of the competition.
First round
Second round
Quarter-finals
Semi-finals
Final
First leg
Second leg
Poole were declared Knockout Cup Champions, winning on aggregate 107âÂÂ85.
Andy Grahame won the Riders' Championship. The final sponsored by Jawa Moto & Barum was held on 15 September at Brandon Stadium.
The National League Pairs Championship was held at Shawfield Stadium Glasgow on 17 June. The event was won by Hackney Kestrels.
Semi finals
Final
Stoke won the Fours championship final, held at the East of England Showground on 22 July.
Semi finals
Final
The top ten rider averages in the National League as of October 31, 1990:
Arena Essex
Berwick
Eastbourne
Edinburgh
Exeter
Glasgow
Hackney
Ipswich
Long Eaton
Middlesbrough
Milton Keynes
Newcastle
Peterborough
Poole
Rye House
Stoke
Wimbledon