Originally Posted by
ATC Watcher
If that is a trend , it is worrying as there are normally a lot of VFR below 10.000 ft and in class E no radio communications is not required for VFR , and transponders are not mandatory either Not a very good idea to put an airliner doing 400Kts cruising in that airspace I would say .
Nothing to stop an operator filing an IFR flight plan in Class E airspace however I'm thinking in terms of UK rules rather than USA rules.