A friend in the pub has just lent me a 1950 little book - "Every Cyclist's Pocket Book"
It's a total treasure trove of facts, mechanics, routes, records etc, from how to break in a new saddle to tandem frame angles, the Pembroke to London tricycle record to rail freight charges for bicycles.
I am attrated though to the paragraph
""Great Britain, with 19 motor vehicles to every mile, has the most crowded highways in the world."
It also states that there are between 10 and 12 million cyclists in GB!!