The "thing" in question that caused it to fail was financial incompetence by the incumbent NATS management. I am sure they would be the first to go. Failure to predict this situation shows a complete lack of business sense. Failed projects and the reputed £120,000,000 lost in the Spanish fiasco give ample enough evidence to hang them.
I suspect the presnet managment would blame the Spanish affair on Richard Everett and co. They will claim they were brought in to sort out just this sort of mess.