The 1934 National League Division One was the sixth season of motorcycle speedway in Great Britain. It was also the first time that a second division/tier of racing was introduced following the creation of a reserves league.
Birmingham Bulldogs (formerly Hall Green) and Lea Bridge rejoined the league.
Sheffield dropped out and most of their team joined Lea Bridge. Clapton Saints, who rode at Lea Bridge's stadium in the previous season relocated and raced as Harringay Tigers. Crystal Palace relocated to New Cross under the promotion of Fred Mockford, with the reason being that Mockford believed attendances would be larger.
Coventry and Nottingham also dropped out.
Lea Bridge had their licence revoked by the Speedway Control Board in late July and were relocated to Walthamstow Stadium, riding as the Walthamstow Wolves, who took on their last ten fixtures.
Belle Vue Aces won their second consecutive double of national title and Knockout Cup. They also completed the treble by winning the A.C.U Cup. Eric Langton of Belle Vue Aces finished with the highest average.
In the 1934 season, a league for reserves and junior riders was introduced. This wasn't continued in 1935. West Ham Reserves won the reserve league dropping just one point in 12 matches.
The 1934 National Trophy was the fourth edition of the Knockout Cup.
First round
Quarterfinals
Semifinals
First leg
Second leg
Belle Vue were National Trophy Champions, winning on aggregate 164-87.
The 1934 Auto-Cycle Union Cup was the first edition of the Cup.
First round
Quarterfinals
Semifinals
First round
Semi final round
First leg
Second leg
New Cross won on aggregate 114âÂÂ97
Belle Vue
Birmingham
Harringay
Lea Bridge/Walthamstow
New Cross
Plymouth
Wembley
West Ham
Wimbledon