LONDON : Britain turned up the pressure on other rich economies to clamp down on secretive money flows at a summit next week by pressing its overseas tax havens into a transparency deal and announcing new disclosure rules for UK firms. Cameron for progress on closing global tax loopholes when he hosts a meeting of G8 in N Ireland. “It is important we are getting our house in order,” Cameron said after representatives of overseas tax havens linked to Britain agreed to sign up to an protocol.