Sadly, although Pathe stuff is a treasure trove of goodies, it's difficult for imcdb because most of it is period newsreel productions, a category which is normally excluded. There are exceptions - Pathe provided some Brit car firms with officially commissioned promo films so these earn some recognition as "proper" films, and another possible route is if they were commercially released such as a modern DVD compilation available in shops/online (something which Pathe have not really done - occasionally something crops up as an extra item on a DVD but that's about it as far as I can tell).

From the same company: Road Manners from 1964; basically a live action version of the Goofy short Motor Mania.

Just came across all these British cars on YouTube. I'll let someone more knowledgeable handle this.