If the airfield is not ATC, its the pilots call and see and avoid applies. I fly from the airfield that had the middair and it was a tragedy, but we can't bring them back now, sadly. I think that we have all been very aware of keeping a good lookout/maintaining situational awareness since then.
The "military" guys normally declare their intentions clearly on the r/t, unlike some (not all) Bl**dy gliders who have been known to appear in the circuit at various airfields without any warning and do all sorts of non standard things on the basis that "Steam gives way to sail" and I've run out of thermals, so I'll land here.... and you can avoid me or go around because you have an engine .
