from the ebay listing for this bike:
Offered for sale is a rare 23in (ctt) Flying Scot frame dating from 1964 and with a 22.5in (ctc) top tube. It was built with Nervex lugs and has hngers for a Cyclo derailleur as well as a stndard Campagnolo type derailleur - the funny thing attached to these mounts at present is a tensioner for use with a hub gear. It comes complete with its original racks, Lefol dimpled guards, Stronglight headset , Mafac tandem cantilever brakes and Lucas dynamo. It is built to take 700C wheels. The frame is in very sound condition though the paintwork is scruffy.
Thanks to Hilary Stone for these images!