The station played a part in the birth of commercial radio in the UK. When the first two radio stations, LBC and Capital Radio, opened in October 1973, the site for their medium wave transmitters was not complete. As a result, a temporary 'Tee' antenna was strung up between the two chimneys (transmitting LBC on 417 m (719 kHz), and Capital Radio on 539 m (557 kHz)), until the permanent site at Saffron Green was ready in 1975. Some years later the site was used again, on 720 kHz (for a low power MW relay of BBC Radio 4's LW service) which was in use until 2001 when the radio transmitter was moved to Crystal Palace.