Wycombe, obviously larger and heavier aircraft can use the smaller, non precision runway at the 'Bushe. 4379' (from the threshold) is tight for a CL300. Obviously, those are landing without a safety factor, and probably not at all if wet.
Again, down to airmanship and mitigation of risks, as is mixing with high density light GA under no radar service when their is a viable local alternative with precision approach and decent fire services and handling.
The DA2000 has good numbers for landing, a different beast.