drauk,
On a related point, I've never understood the logic of allowing IFR traffic to go right to the edge of a controlled space (either laterally or vertically) given that you could end up with very few feets separation - can anybody enlighten me?
We routinely descend the IFR stuff to the base of CAS plus 500ft. For example to 3,000ft when vectoring to 09L where the TMA base is 2,500ft just to the west of White Waltham. Also in many other places.
Lateraly, aircraft operating inside CAS are also deemed to be separated from those outside the CAS, though we should try not to get the IFR stuff closer than 2nm from the edge if possible.
WF.
p.s VA, check your Pt 1, it's only necessary to stay 2nm inside
