Early in the new year of 1958 the BRSCC announced plans for a new championship to cater for the competitor who wants to race the ordinary family car, to do so throughout an entire season against evenly matched opposition.
Modifications were limited and entries were to be divided amongst four classes:
- Up to 1200cc
- over 2700cc
The British Motor Corporation (BMC) presented a cup known as The Bonneville Trophy to the driver gaining the greatest number of points after the 9 events.
After a season of racing, two drivers had the same amount of points - a final had to be staged. The winner would be Jack Sears.