The image above is dated August 1950, the cost was 2d . I realise that unless you have a huge screen you will not be able to read it so I have re-written below, one line equals one cartoon.
It all began amongst boys interested in motor-cycle speedway racing. They found it possible to imitate on push bikes the methods of the motor cyclists. Bomb sites provided convenient spaces for these push-bike racers. The tracks began to be cleared and marked out. Teams with home-made uniforms raced in matches against each other. Skilful riders began to find ways of improving their bikes for the new sport. Leagues were formed with proper management committees in which grown-ups gave a hand. Many teams showed enterprise in laying out proper tracks with concrete edging and rolled surfaces. A well-known firm of cycle manufactures put their designers on the job of producing machines especially for cycle speedway. The sport is now well regulated, with proper leagues, in many towns all over Britain. Cycle speedway is also popular in other countries. In Sweden races are help on ice covered lakes.
The circle in the middle suggests that there are nearly 300 clubs that are members of the National Cycle-Speedway Association and that hundreds more are still to register.