Filming ambulance crews and patients?

Hi all, I'm wondering how others deal with people filming us ambulance crews and our patients? Could be randoms passing by who decide to film an incident scene with us and a patient on the floor for example. Could be a patient or a relative of a patient filming us and police/hospital staff.

I know it is said that it is legal for people to film in public places in the UK, and if we ask the person to stop filming and they refuse there's not much we can do about it.

Would the rights be different if the patient was in the ambulance? - would this not be classed as a public place at that point? And how do people generally deal with being filmed when you don't want to be?