Original: The Sony Radio Academy Awards: Winners 2004Sony Radio Academy Awards - Winners 2008 Costing £71.4 million (2005/6),BBC Annual Report and Accounts 2005/2006, page 106 it is the BBC's most expensive national radio network and is considered by many to be the corporation's flagship.
Simplified: Radio 4 costs £71.4 million a year,BBC Annual Report and Accounts 2005/2006, page 106 and is the BBC's most expensive national radio network.