Norwich really is a sleepy airport
The departure board can't be broken 2 weeks in a row. To me it appears that there are only the 3 KLM rotations a day on Saturday and the same Sunday until 4pm when there are 4 other flights. In terms of day time flights when there could be perceived to be some risk from conflict with other airspace users Norwich have only 2 or 3 rotations in the whole weekend. I can't see why so much airspace is needed.
bb