Let's make something quite clear. There are procedures to follow which allow disturbance or changes to Scheduled Ancient Monuments, just as there are to allow things to be done within SSSIs. It isn't illegal to disturb a site, but it is illegal to do it without permission. The problem lies when people do not follow these procedures. And this is the inevitable consequence of not seeking permission in the correct manner, starting with the owner. The issue here is not necessarily that a monument has been disturbed, but that the disturbance was done without any consultation. I am not saying that permission would have been granted, but as the procedure was not followed, the perpetrators have effectively "cooked their goose", and everyone else's as well. Comments on this thread are not exactly making things better - I am sure Cadw will be monitoring this discussion. That's why a direct condemnation of illegal actions is very important, and people need to get "on message".