Not sure i totally agree with Tinwalds reply..ie: rear end covering. The level of emergency response and preparedness is pre arranged through an Emergency Planning Group and regulated/audited by the CAA at a licensed aerodrome. The level of response is referred to as PDA (pre determined attendance) and necessarily guarantees a minimum level of response to a range of incidents, on and off airport. More about good planning than 'rear end covering' methinks !...
