I believe it was originally built as a Tour of Britain spec bike, so GB brakes and levers, GB toe clips, Renolds domed seat post, Conloy rims on high flange BHC's, Cyclo ToB gearset (2 x 4speed), front and rear derailleur (the front is a lever type), original Gnutti headset, coventry chain and a couple of items that were 'optional' in Hetchins '52 catalogue - a Chater Lea double chain ring fluted crankset, Titan stem with Maes/Kint bars and Brooks saddle, bar wrap and toe straps. Oh and a pair of Coloral bottles and matching bar mount cage.
I now face an awful lot of work getting all of the components to a standard commensurate with the frame.