The BBC first started broadcasting radio programmes during November 1922, however, in those days broadcasts went out live and nothing was recorded.
As time passed, the BBC started to record shows in high quality for broadcast outside of the UK. The BBC Recorded Programmes Library was set up in 1936 just for this reason.
The BBC shipped out discs to radio stations around the world subject to very strict contracts. These normally allowed them to broadcast the discs for a licenced period (usually 2 - 3 years with an expiry date printed on the disc label) and required the discs to be destroyed or returned to the BBC on expiry. It seems not all were destroyed and some have now become part of collectors libraries instead, like mine.
Note that the costs of administering this service would paid for by the UK Foreign Office, rather than the BBC licence fee. Also note that although the BBC Recorded Programme Library name still existed, the name of the department had change to the BBC Transcription Service. This name changed again to the BBC Transcription Services later on as well.
The original recordings were made on shellac 12 inch 78 RPM discs or acetates and normally allowed for around six minutes of recordings. The main issue with this is that the overseas stations required a DJ to switch discs every time that side had completed. A typical programme would last around 27 minutes in total, meaning a total of 5 switches of side. The next side would typically be on a different disc where the label would show the order to play them in by stating Side 1 of 6 for the first side, if you flipped this over it might say Side 4 of 6. Side 2 (possibly Side 5 on the reverse) and 3 (possibly Side 6 on the reverse) would be on different discs, and so on. DJs would have two record players side-by-side and would set up the next disc ready to cue when the previous disc finished if that change didn't require an advert.
I don't have any of the original ones of these in my collection but they continued to be issued after the switches described below. The picture and link associated with this section takes you to the oldest example I have which comes from 1950s, but I don't know what year this was printed. I also have some BBC sound effects 78s and a BBC Engineering disc in this format.
These were not issued to the public and it is not known how many were originally produced, but probably had a maximum of 100 printed.