Business Green: Prime minister Gordon Brown will this week confirm the winners of the long-running auction to build the UK’s next wave of giant offshore wind farms, officially firing the starting pistol on the race to deliver more than 25GW of renewable energy. The Crown Estate, which manages UK waters, is expected to announce the award of nine offshore sites for the so-called Round 3 developments. The prime minister is scheduled to attend the announcement of the winners at an event in Exeter, …