My comment was directed at separating commercial aviation from non commercial.
Yes, so much you made clear, but I am afraid I still can't see how this could ever be implemented.
"aircraft such and such, according to your ADS-B output you are commercial yet you are in the non-commercial airspace, get out immediately or you'll have a couple of Tornado's at your b*m with all the cost and hassle associated"
The inverse situation might be even harder.
Or, put otherwise: the UK may or may not remain in the EU - the UK may or may not remain with EASA - but the UK will be bound by ICAO regulations, lest they go REALLY
cavalier seul - so they'll have airspace class A-B-..-G and that's all.