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 F1 Stock Car Racing - The Tracks, The Drivers, The Records, The History by Malc Aylott.
1954 - 2008 Fifty-Five Years of BriSCA F1 Stock Car Racing History 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.
The Paul Broderick & Kevin Sharp website at www.BriSCAF1Stox.co.uk is a statistical goldmine of historical information