Do we have a section for pictures of various forms of transport? I realise that one dedicated to motorbikes might be a bit esoteric but may I kick off such a section with the following:
Probably an Ariel "Red Hunter" 500 vertical single, picture dated 1952.
Probably a Triumph Type H (Trusty), dated before 1924. The Trusty was the motorcycle chosen for despatch riders in WWI.