The BBC is now offering live radio over the internet to most mobile phone users. It says it's previously restricted the service due to the cost for consumers and the bandwidth limitations of mobile web traffic, but has changed its policy after seeing the increasing number of mobile phone users visiting the BBC Mobile website.
Optimised audio streams have been developed depending on the device being used. (Online radio isn't currently working with Apple devices and isn't available on company phones where administrators have blocked audio/video streaming). Mobile users who enter the standard web address for their chosen radio station are automatically redirected to the mobile optimised site. There's a 'Listen Live' link that prompts a warning about charges before audio streaming begins.