Thank you for all the helpful replies and the different perspectives.
So to summarise:
- VFR transit of Belgian controlled airspace is normally not a major issue, including through the EBCI TMA and even CTR, ATC will accommodate your transit request; however (obviously), have a plan B in mind
- Belga (Mil) Radar can help you navigate around any military activities
Remaining question I have is: How often are the TSAs/TRAs really active? I have noticed that Elsenborn TSA and the danger zone (I think that's EB-D6A, I don't have the map to hand right now) are often active for short periods of time, this is announced through NOTAM. I notice from the Belgian AIP though that there are many other TSAs that can be activated and that their activation apparently is not announced through NOTAM. One example is the TSA just sitting above EBCI. Are these really active on a frequent basis or are these placeholders in the map for areas that be activated if there is any large military operation/training taking place, which would be more infrequent?
Regards,
Wolfgang Bardorf