Broadcast shortwave (and long wave) uses Amplitude Modulation, the term "AM" has been hijacked in some forms of English to mean "medium wave" but it's not what it means to radio engineers etc. I can't complain because I regularly refer to VHF broadcasts as FM ;-)

BTW in addition to shortwave BBC World Service broadcasts (or provides material for rebroadcast by local operators) in : Long Wave; VHF; DAB and Satellite.

They used to have an AM transmitter that reached most? of Europe, but it was shut down in 2012: https://en.wikipedia.org/wiki/Orfordness_transmitting_statio...