Last year in the summer peak, Wizz has had a couple of departures before 6am thus cutting into the night noise restriction period, which is subject to next years planning application to increase the noise limit. This seemed to be down to the fact that once the clock hits 6am the airport has a lack of slots for a couple of hours. With this in mind I would then have expected that in the winter season Wizz would move those departures to after 6am to save this limited resource but no they just carry on. Tomorrow for example there are two 5:30 departures yet there are only 3 departures between 6:00 and 6:24. They don't seem to be putting much effort into helping themselves.