ORANGE and T-Mobile look set to become the UK’s biggest network after their long anticipated merger received the thumbs up from Brussels. A drawn-out investigation by the Office of Fair Trading (OFT) looked likely but a string of concessions appear to have smoothed the way for the merger to go ahead as early as this week. It is expected both brands will be retained. The most important concession is a new deal struck with 3, the UK’s smallest mobile network, to allow it to use 16,000 of the new firm’s mast sites, 3,000 more than under its previous deal with T-Mobile. Orange and T-Mobile have also agreed to relinquish a quarter of the contentious 1800MHz bandwidth, which allows super-fast fourth generation mobile internet.