I would like to acknowledge with thanks the information gleaned from the following publications all of which I can thoroughly recommend:

BriSCA Formula One : The First 50 Years 1954-2004 by Keith Barber.

Keith Barber's excellent magazine publication, Stock Car.

1954 - 2003 Fifty Years of Formula One Stock Car Racing by Malc Aylott.

Stock Car Numbers (A reference guide to the racing numbers used on UK F1 Stock Cars)  1957 - 2007 by John & Mike Greenwood & Granville Holmes.