There are more developments in the Leveson story this week. As Oliver Letwin works on a draft Royal Charter, newspaper publishers meet to agree their own new road map and the Lords discuss regulation, Hacked Off's put out its own draft bill and the Information Commissioner's released his response to Leveson. Steve Hewlett hears from Hugh Tomlinson QC who's behind the Hacked Off bill and from Christopher Graham, the Information Commissioner. Newspapers this week have reported the commissioner warning about the potentially "chilling effects" on investigative journalism if the Leveson recommendations are implemented in full. Channel 4 is yet to renew its deal with Group M, which buys around £250m of advertising from the broadcaster each year. There's disagreement over where Channel 4 is still as valuable to advertisers as it has been. Mathew Horsman of Mediatique media consultants and Lisa Campbell of Broadcast magazine look at the underlying performance and the overall strength of the broadcaster's programmes. Staying with Channel 4, employment lawyer Jane Moorman of Virtual Lawyers Ltd looks at John McCririck's claim for compensation after he was dropped from Channel 4 Racing at the age of 72. He's seeking £3,000,000 for age discrimination - a claim Channel 4 rejects and says it will vigorously defend. The producer is Simon Tillotson.