Rock Radio is a wholly owned subsidiary of GMG Radio Holdings Limited. GMG Radio is one of the UK's largest radio groups and operates stations ... See more across the UK under the brands of Real Radio, Smooth Radio & Rock Radio. More information about the group, it's stations and latest news & information can be found on the GMG Radio Website. GMG Radio is a wholly owned subsidiary of Guardian Media Group plc ('GMG'). Guardian Media Group is one of the UK's leading multimedia companies. Its diverse portfolio includes: * Guardian News & Media: the Guardian and Observer newspapers and the Guardian Unlimited network of websites. * GMG Radio: 14 radio stations under the Real Radio, Smooth Radio and Rock Radio brands. * Channel M: the TV station for the city of Manchester * Trader Media Group: one of Europe's largest specialist print and online media companies, and publisher of the Auto Trader magazine and website. Trader Media Group is jointly owned by GMG and Apax Partners, with GMG as the majority shareholder. * GMG Property Services Group: Vebra, the UK's leading provider of software to independent estate agents GMG is wholly owned by the Scott Trust, which was created in 1936 to secure the financial and editorial independence of the Guardian in perpetuity.