Ocean City Radio
Ocean Youth Radio
Official Big Top 40
Offshore Music Radio
Offshore Radio Sounds
Oldham Community Radio 99.7 FM
OldiesProject
Oldies Project London
Old Skool Anthemz
Old Skool Party Radio
Old Skool Rave Tapes
OLDSKOOL UK
Old Time Radio
OLDTYMERZ RADIO
Omega Radio 104.1 FM
Omnium Radio
One Jazz
Only Old Skool Radio
On Top Radio
OPE Radio
Optical Radio
Original 106 FM
Original 106 Gold
Original 106 Party
Original 106 Rocks
OriginUK
OSIKA Radio Hits
OSIKA Radio UK
OSN Radio
OSN Radio Plus
Our Music Radio
Our Salsa Soul Radio
Outreach Dance
Outreach Radio
Overton Radio
Oxide Radio