Most of the actual radio transmitters are no longer operated directly by the BBC. As far as I know the only site still under their operation is BBC World Servic

Most of the actual radio transmitters are no longer operated directly by the BBC. As far as I know the only site still under their operation is BBC World Service Atlantic Relay Station on Ascension Island. Whilst the BBC still produces the radio and TV programme content, in the UK the radio and TV transmitters are operated by Arqiva and World Service shortwave by Babcock. I was lucky enough to work on one of the last remaining operational high power longwave AM radio transmitters in the UK at Droitwich Transmitting Station. BBC Radio 4 longwave is broadcast at 500kW on 198kHz (locked to a HP 5065 Rubidium standard) and can be received in large parts of western europe.