It is not just CK Hutchison which is on tenterhooks, to see whether the European Commission green-lights its plan to acquire Telefonica’s O2 UK arm – and what the conditions may be. The UK’s broadband players, particularly Sky and TalkTalk, as well as potential new entrant Iliad of France, are also watching the situation closely, hoping that the terms of approval may throw them the opportunity to up their game in mobile and quad play services. The latest twist in the saga came this week with an open letter opposing the planned deal, written by the head of the UK Competition and Markets Authority (CMA), Alex Chisholm, to the EC competition commissioner, Margrethe Vestager. He said the merger should be…