I have asked SM about this drive. "Haven't a clue old boy. I'm so old I can be excused for not remembering a thing. These days even my memories of the birds are hazy..."
DCN
In July 1964, both Autocar and Autosport magazines announced that Stirling had been driving a racing car around the Brands Hatch Grand Prix circuit filming a 5 minute dice, showing what lines to take and signs to look for. It was produced in 8mm and a 45 record was produced that could be "synchronized" to the film. The film was produced by Cine-Circuit Films of St James, and was for sale at one of the Brands Hatch paddock shops at that years British Grand Prix.
It was announced that Stirling had agreed to make follow-up films of all the major British and Continental circuits. Thanks to Kathy Ager for discovering this information.
While this might offer one idea why Stirling was driving the Normand Racing Team Cooper F2 at Silverstone two years later, it may also be unrelated.
Has anyone seen "Moss at Silverstone" by Cine-Circuit Films, reviewed in R&T, October 1966 ?
SM did confirm to me that he was contracted to John Sturgess, so until the Cine-Circuit film from Silverstone is seen, filming for "Day of the Champion" remains a possibility...
And then Ted still thinks it was BP related filming....