I think that Deloitte would have some well articulated risk management guidance and thresholds that would be relevant in a circumstance like this.
Spot on - Deloittes will have to be very careful with this one - I would not be surprised if they walk away (read call in the receivers) if there is even a sniff of running beyond the limited cash remaining. The government should not touch this with a barge pole, and commercial imperatives must be allowed to run their course.