You're simply choosing to misread what I have said and dodge the question.
I grasp what you're saying, and I agree! All these things you say about Steadman are true, except for these unimportant details:
Now he has the freehold, QMP's remaining debts (which are academic because QMP has no money) are not to him but to his company QMH and its subsidiary PLM
CRT cannot directly demand that QMP or Steadman pays the debt, i.e. they cannot sue for it.
BUT, and this is my point, CRT could make a payment, which mysteriously happens to be same amount as the vanished debt, a pre-condition of granting an NAA. Section 43 of the Transport Act 1962 gave BW power to decide who can have a NAA "as they see fit", without specifying any conditions as to how BW should exercise that power, and when CRT took over in 2012 it inherited BW's role. CRT could just say to Steadman "No money, no NAA. If you don't like it, you'll have to take us to court to make us grant a NAA. But how?" This is the situation you are not grasping. There might be some law they could use, but if so I don't know what it is; please tell me. If Steadman or his minions don't go to court, CRT don't get the money but Steadman doesn't get a NAA.
Having said all that, it sounds as if CRT are not following quite such an adventurous approach, and I suppose that means their lawyers know something I don't. Not too surprising, they've done law degrees and I haven't.