Sorry to butt in on this thread, but I just found it and cannot navigate it properly, so I post here! I have been researching these MILLSONs for some time, and have a fair amount of info, except the CORKILL and BARROW lines in the Isle of Man. If you wish to contact me direct on tonyAATTwiddowsDDOTTcomDDOTTau I can perhaps help (make obvous changes to address)
cheers
Tony