Not good, hopefully they were just on the nose about round deserted units and not aware of what is inside and had made a special trip as they may be back.

Are there other people with units there? Mate of mine used some old barns, about 10 other smalls firms mainly car repairs up there. His mate dropped a cossie off late one night, removed the leads, covered it all over and locked up the place, next morning it was gone! without a doubt it was one of the other firms on the site as it was only his place that got targeted and was sold all in there but the car.