It's not just about controller numbers though, is it? Although you can do three radar positions from one ops room with a lower ATCO salary cost than would be required by doing the same tasks from three ops rooms, it's also about requiring fewer Tels engineers, assistants and other ancilliary functions, and less infrastructure. If you're going to fight this, (and you should imho), then don't try to argue that the suits have got their sums wrong. Instead, make the case for your local knowledge and expertise that will be lost, and explain why that should valuable to them.