Thank you for your concern Alex, but I am not the caretaker and am a long way from Wiltshire.
My health is not perfect but that isnt related to this situation - yet!
My concern is that the site is being systematically targeted by "professional" vandals, and the person that does the vast majority of the work is being harrassed and bullied for his endeavours, while the perpetrators are left to continue in impunity. The only response mooted so far has been to let the cack have the place, either as a "sealed" system or just abandoned by those that care. There are numerous entrances, and more could be created quite simply. With it being a bat roost complete closure is not going to happen anyway.
Lots of people must know exactly who is doing this, and implicity supporting it by going to the underground parties. Everyone that drops litter is also contributing even if they dont daub emulsion or spray paint, pull down deads, smash artefacts and generally foul wherever thay can like toddlers that arent toilet trained.
To me, being so far removed, it is of little real significance. It is a venue far from the main caving areas, with little technical appeal other than navigation. It is if major historical importance to the locality and perhaps nationally, as well as being a major roost spot.
If you know the culprits, please persuade them to desist. If it is you, please, move onto something less contentious