What separation do you try to apply between your IFR traffic and unknown VFRs in Class E?
There's as well no requirement for applying any separation. IFR arrivals and departures are either being vectored just around the visible VFRs on screen (sometimes that's just a nice try...), or simply to let them fly own nav on SID or STAR (procedural arrival). Of course, trf info will be provided as long as possible. And last but not least: The app atco needs a hard shell! ...and the flight crews good luck!
As I said before, there were numerous reported airproxes, some of them hottest category, and the authority still doin nothing against it.
As I see in NS' comment, UK's authority did learn. Others still trying hard...
