I have the British Speedway Handbook for the first BL season 1965.Maurie's picture is in it as part of an Exeter team pic, he rode in 25 BL matches and his CMA was 4.2. Think this would have been his last season.By the way are averages still calculated the same way -then it was points plus bonus points divided by number of rides, then multiplied by 4 e.g. in Maurie's case his ave per ride was 1.05 times 4 = 4.20. This was done because riders typically rode 4 times per match.Bryan Seery was the originator of this method I think??