Chugs:
They will come down fast about your head, and given past precedent in the UK, it will be you that is in the poo and not the superior who issued you the order. Tough!
It is worth noting that all superiors have a duty
not to issue an order to their subordinates that they know to be illegal. I believe the it may also be true in the British military that they must not issue an order they know will not be obeyed but I stand to be corrected on that.