A major fire at a transmitter has left an estimated 1.3m radio listeners without an FM service.
The mast at Morborne, Peterborough, Cambs, caught fire on Saturday evening, collapsing onto transmitter buildings and neighbouring fields.
Radios 1,2, 3 and 4, BBC Radio Cambridgeshire, BBC digital radio and Classic FM are all affected.
The transmitter covers Cambs, and parts of Lincs, Northants, Leicestershire, Beds, Bucks and west Norfolk.
Mobile telephone reception has also been affected.
Scenes of crime experts and forensic teams are at the transmitter site, which is owned by Crown Castle International.