Guardian: Environment editor John Vidal at Copenhagen Link to this video Gordon Brown now believes deals on financing to cope with the short and long term effects of climate change are possible tomorrow, as the summit enters a fraught last 24 hours. In briefings tonight,two days after the prime minister arrived at the talks aiming to break the deadlock, he told reporters he believed world leaders were "absolutely" more than halfway towards a deal but that they would be "working through …