Some Sid Mottram info at
http://www.classiclightweights.co.uk...ramcycles.html . The long number on the Nervex bottom bracket is a Nervex casting number; I have one on my Bates which has a separate serial number. Airlite hubs were made by British Hub Company, and good quality as mentioned; see
http://www.classiclightweights.co.uk/airlites.html . Definition of Path racer by Hilary Stone: "track and path are synonyms sofixed wheel only and without a brake. But road/track or road/path frameswere built as the name implies for both road and track use and could(and were) used on the road with a Sturmey both for training on and for time trials." ......... Peter