Goog morning Howard, If the bike was sold by Horsman's they would definately have registered it, the system was that everything from BSA had paperwork and bikes delivered to Cundles ( who in 1962 would have been still Byrom st in liverpool they were redeveloped by L-pool council during '66 to Copperas Hill Office Pembroke Place) and then Horsmans would have picked it up on there combo ,a M21 of course, prepped it and registered/taxed it .Conversely the same would apply if Cundles sold it.In my day's there I remember going to a big tax office but it defiately wasn't the maain office as Liverpool was part of Lancashire then and the main office was on Fishers gate Preston I rememeber having to go there often with changes of ownership details and such like. Howard are you a member of the BSAOC 'cause if you are they will provide dispatch details for your bike even if not they will still provide the info for a fee but I'd join they have a wealth of info regarding this stuff has they were given the factory's dispatch books when it closed. There is just one other thing that could explain the Scottish plate, Horsman's were very customer orientated even then so if you had a customer who was a really picky and they would allow the bikes to be transported direct to the client and registered by them to avoid having a dealership stamp in the logbook ,in '67 I can remember a real character a college lecturer who ordered a Thruxton Velo ( we were Velo dealers as well ) and insisted noone touch it and off it went in the crate to his house. Any thing else I can help with please don't hesitate to ask, oh by the way I've seen both cundles and Horsmans dealship plates at auto jumbles once established it could be nice to reunit it with the correct one, regards Bob.