Some examples of types that can be/have been seen in the
visual circuit at Doncaster. Needless to say they don't show up on Teletext as movements.
The environment issue is a real one. I've done a large amount of work with noise complainants, though not at DSA. people get used to aircraft flying 'known' approaches and departure routes, when they vary significantly, 'non standard' they raise concerns amongst the populace very quickly, who can and do object to all aviation in all its forms.
So the 73 that is 'off course' becomes any aircraft that is seen. That gives grass roots problems for people wanting to use grass strips, increase flying from a location with planning regulations etc etc. It also does the wider aviation community no good, in giving free ammunition to the detractors/environmental campaigners who oppose any form of aviation. In a previous life I visited a small airfield between two commercial ones that was having a hard time, because the 'public' associated their movements with those of the larger airports. Unfortunately for Joe Public that distinction generally, isn't there. Not to mention adding fuel burn to an operator at low level, pax concern if a go round occurs, and the resultant coverage, how many sensationalist threads have there been on this forum about a simple 'go round'? They can all be environmental factors to varying degrees.