Oak FM - Loughborough
Oban FM - Oban
Off The Chart Radio
Offshore Music Radio - Internet
Oldham Community Radio - Oldham
One Media Radio - Internet
BBC Radio 1 - UK
BBC 1Xtra - UK
101.4 OnFM - West London
Onslaught Radio
Original 106 - Aberdeen
BBC Oxford - Oxfordshire
Oxide Radio - Oxford University
Oxygen Radio - Internet