The Droitwich Transmitting Station, located in Worcestershire, England, near Droitwich and the village of Wychbold, is a significant broadcasting facility established in 1934. This large station, owned and operated by Arqiva, houses the British Broadcasting Corporations (BBC) most powerful long-wave transmitter. The site was selected in December 1932 and purchased in March 1933. It features two prominent 213-metre-high (700 ft) guyed steel lattice radio masts, standing 180 metres (590 ft) apart. These imposing structures are visible from a significant distance and support the T-aerial used for long-wave transmissions. The station also transmits on medium wave (MW) frequencies.

A crucial function of the Droitwich Transmitting Station has been the transmission of BBC Radio 4 on 198 kilohertz (LW). Importantly, this long-wave signal also carries data for the Radio Teleswitching System (RTS), a service used by energy suppliers to switch electricity meters for time-controlled tariffs such as Economy 7 and Economy 10. The RTS data, including time-of-day and control signals, has been encoded using phase modulation since the early 1980s. The BBC transmits this signal on behalf of the Energy Networks Association (ENA). However, the use of the long-wave signal for RTS is scheduled to end by at least 30 June 2025, necessitating the transition of remaining customers using RTS meters to smart meters. The planned cessation of the long-wave transmission is also linked to factors like reliance on rare glass valves and past budget announcements.