The Heathfield transmitting station is a facility for FM and television transmission at Heathfield, East Sussex, UK (grid reference TQ566220). Opened in 1969 it uses as its antenna mast a 135 metres (443 ft) tall guyed structure, giving average transmitter height 256 metres (840 ft) above sea level. A wideband horizontally polarised aerial is required to receive both digital and analogue TV signals, although the original analogue signals are in band C/D. In July 2007 was confirmed by Ofcom that Heathfield would become a B group transmitter at DSO (Digital Switchover), though all the digital MUXES would be still be receivable on a C/D group aerial (see graph) in most areas. The station's coverage area suffers from co-channel interference problems, particularly to the south, not only with Brighton (Whitehawk Hill) but with the continent as well.