Hi Steve,
There is an old dealership in Ottershaw, Trident, (how a Honda Dealer) there are a couple of older pictures on their website in the history section. Although they may not be keen them being reproduced without speaking to them first, there are some screen-shot from an episode of The Sweeney which shows it in the background - plus a Dolomite and Spitfire
http://www.tridenthonda.co.uk/pageloader.pl?page=home_other_abouttrident_history_thesweeney
.......... Andy