I think it would be quite amusing this morning if the bailiffs didn't attempt to evict them. I'd even consider setting up a barrier to fence them in 100m outside of the site boundary and just let no one, or nothing through unless it's out!
Cut off all supplies.
Make it a blockade, over weeks and months if necessary. I'm sure it would be a cheaper way.
See how long the guy with his arm concreted in to a barrel lasts then:w00t: as well as the mutlitude of TV crews that seem to be inside!