D and F
FL100 for 24 is not usually a problem.
At the airport we want the inbounds at a reasonably low level otherwise we soon run out of airspace for your descent. Without trying to open a can of worms, a certain watch at Scottish was, not to put a finer point on it, awful at streaming inbounds and often left us with multiple aircraft passing the hold well above FL100, and just chucking them to us expecting us to deal with it (we called it the 5 finger f**k). Obviously if we take the aircraft out to the east we run the risk of taking them outside controlled airspace and more often than not the military are playing around there. That is why we wanted min stack by Tartan. I also must add that the co-operation between us and Scoacc has since greatly improved but am also lead to believe it is slipping again between certain watches.
The main problem is differentiating between runways 06 and 24 as we have even more problems on 06 with no where to go to if an aircraft comes over high and heading towards final approach. We soon run into PF's airspace.
A novel idea would be to follow most other TMA's and have the aircraft running towards the holding fix level separated. Nice and safe, it's the flight planned route and all pilots know where they stand, but that makes too much sense. If it works in London it's got to work here in a much less busy environment. I think the sticking part of this however lies over at Prestwick!
Cheers