 The BBC 's national DAB ensemble broadcasts on frequency block 12B ( 225 @.@ 648 MHz ) across the United Kingdom , with coverage currently at 94 @.@ 4 % . The multiplex is owned and operated by the BBC and is transmitted from a number of transmitter sites across the country . The BBC 's national multiplex carries only BBC national radio stations . Local BBC radio stations are carried on the relevant local DAB ensemble where commercial DAB licences are operating . 
