Following NP's comments yesterday, I sadly suspect that even if he isn't gone tomorrow morning, he will be after our next defeat, even if we win eight in a row first.
It seems to me that Nige is bringing this to a head because he is aware that he won't be permitted to see his contract out anyway.
If he leaves when his contract expires, then he will be owed nothing (financially, anyway) by the club. And presumably (I stand to be corrected), Lansdown would be unable to hush him up with a non-disclosure agreement. NP could say what he liked.
Unlikely, but if he is sacked, I would absolutely love it if he told Lansdown to stick the rest of his money and told the world what is really going on.