Class. Reading between the lines, Premier owe Denham a shed load of money to the point that airfield management are forced to change the locks. I'll take a stab at a few hundred thousand in rent and fuel. One also presumes that there has been previous discussion between the parties as no one would be daft enough to lock the doors at the first opportunity. Management transfer business activity to another airfield, for which everyone should be eternally grateful, leaving Denham with an IOU.
Call me a bluff old traditionalist, but I'm not convinced this will do anything other than provide short term respite to an apparent cash flow problem; the elephant is almost definitely still in the room. The bit that gets under my skin is that for every company that fails, another is almost inevitably dragged down.