The dog owners may not be aware of the potential dangers involved. A couple of years ago I had my caravan at Ashridge Farm Caravan Club site for a couple of nights. Also there was a family with whom I chatted. It transpired that they had recently visited North Weald and had let their dog run free - fortunately it was a dog which came when called. They were absolutely horrified when I quietly pointed out the dangers and why the landrover had gone out to them and asked me to apologise to NW on their behalf which I did - Aer Babe can confirm this. I am sure that theirs is one dog which will never again roam free around an airfield. I exercise my dog on the club airfield after it has closed. He has a wonderful time running free, tracking interesting smells and generally doing what dogs love to do but I always have one eye on the sky. During the day I use the old taxiway to get to the fields where he can run free in safety but he is always on the lead until we reach them and back on it before we get anywhere near the taxiway on our return.