The multiplex carries stations including Absolute Radio, Classic FM, TalkSport, LBC, BFBS and the new Heart Extra service to DAB digital radio users.
In a statement issued this week, the multiplex operator admitted that the new sites are "unlikely to greatly increase the number of people that can receive the network", but that "they will give listeners more reliable reception."
The new sites officially confirmed by Digital One are:
- High Hunsley (Central Hull and surrounding area)
- Dunkirk (covering North Kent coastal areas)
- Brown Carrick Hill (covering Ayr and the immediate area)
- Glasgow William Street (covering Central Glasgow), also known as "Glasgow Hilton"
Digital One has said that a fifth transmitter is "planned for later this year" and will provide details once it has gone live, but a516digital understands that Hyde Farm near Maidenhead is the latest Digital One transmitter site.
Local digital radio networks are also profiting from additional transmitters, with new sites often set up to broadcast both local and national DAB services. The aim is to ensure that local DAB digital radio coverage is akin to local commercial radio FM coverage.