Spiney N
You're probably right! There must have been a master list somewhere. As to where it is now - my suggestion is at Kew, somewhere amongst the PRO's AIR series of files (Possibly AIR 8 series?)
B's mission (should he decide to accept it) is to find the definitive list!
Problem is, you could spend days searching in the PRO and still not find what you're looking for. What might speed things up is that their catalogue is now available on line at
http://catalogue.pro.gov.uk/ .
P