July 9: Tone changes in battle for TNS

The battle of the TLAs (three letter acronyms) is hotting up on Wednesday as first WPP made a hostile offer for the market research company, Taylor Nelson Sofres (which it has been wooing for three months), and then its rival GfK hit back with an intention to launch an all-cash offer. Tim Bradshaw, digital media correspondent, has been following the story and reports on the latest developments.