If they have a emergency i would assume they had their hazard lights on.
You are allowed to do a "private" ambulance run here if you absolutely have to, but one of they things you must do is advise the police that you are doing so.
you also have to put a white cloth on the front of your vehicle just don't ask me how, i would say opening your hood and wrap a bed sheet around the lid and then close it. Well i an not sure it would stay in place and could actually be a hazard then.
And you cant do much on the grill without blocking airflow to the radiator, and you can only use a little cloth there i assume, same go if you put a handkerchief on the antenna.
Examples seem to say put a white cloth in the door window, though thats not the front of the car, and it can limit visibility to that side.
Another thing that just outline how incompetent some things are here, law say white cloth on front of car, police advise to put white cloth in door window ????? i mean come on.
But you don't need to have your hazard lights on here.
And you can break speed limits, but not drive hazardous, a guy flashed in speed trap driving wife giving birth to hospital got blitzed in a speed trap but fine was canceled due to the circumstances.