Mr. Philip Hughes:

It depends on the country. In Ireland, we have had free route airspace since 2012. It works well. We also have the advantage that ATC has the ability to change the shape of the sector depending on how the traffic presents. Therefore, from an ATM point of view it is very efficient. The UK introduced it quite recently, particularly in Scotland, but when they get further into congested airspace, they struggle a little. More free route is still needed in central Europe.