Which racing organization did Jim Gavin start in 1973?

Lawnmower racing is a form of motorsport in which competitors race modified lawnmowers, usually of the ride-on or self-propelled variety. The original mower engines are retained, but blades are removed for safety. The sport attracts all ages, and is usually entered into in a spirit of fun rather than extreme competitiveness, though many participants do take it seriously.

The British Lawn Mower Racing Association (BLMRA) was formed in 1973 by Rally co-driver Jim Gavin. Jim and a bunch of fellow sporting enthusiasts were bemoaning the prohibitive costs of getting involved in any kind of motor sport whilst enjoying a pint at The Cricketers Arms in Wisborough Green, West Sussex.