We returned from France with our friends yesterday and had to report to the pet passport office first. Whilst we were there an illegal immigrant climbed under his camper without him realising. When we pulled out of the enclosure we were aware of several young men in the bushes. We were a bit alarmed by this but procedded through the various stages before entering the train. Approximately 2 hours later whilst following our friends on the M25 we could see something under his van. I thought at first a bin bag had blown under but my husband immediately thought it was an immigrant. We alerted our friends who thought we were just messing about. However a couple of miles down the road we hit a traffic jam and came to a halt and out from underneath the camper came a young black gentleman and he just walked down the hard shoulder of the M25. We tel eurotunnel and they said the pet passport office was out of their jurisdiction and that they had made 3 arrests that morning when people were attempting to break into caravans. I cannot believe that there was absolutely no security at this point and that nobody checked under the motorhomes when we were stopped to check that the gas had been switched on. From now on we will get the dog out of the camper at the waiting area so that we can check underneath ourselves. I did call the police but don't expect anything came of it