I've contacted the ranger, just waiting to hear back from him and see what our options are. I think it would be good if more of the wood was fenced off - it might deter the scummers who keep fly tipping over there - but obviously it would be expensive and the FC may think it's a bit disproportionate to keep out a couple of idiots.
Sam, say cheers to your dad for me. I will get up there and do some tidying soon, honest.