For those interested in family history, as opposed to simply pinning names on their family tree, the question of when your ancestors first owned a car - and what model it was - adds to the story. Often a car may be seen in the background to a family photograph, or you may have a snapshot of that new car, perhaps with its owner also in the picture.
In addition cars and their registration plates can provide useful clues as to the date of the street scenes, etc.
For this reason I have set up a subject page for cars, to include some examples and links to pages that can help you identify them. Any pictures of old Hertfordshire family cars - or links to sites you have found particularly useful - will be welcome as they will allow me to make the page even more valuable to other visitors to this site.