It wasnt a mistake at all. It was fukcing Brilliant!It was a mistake from Warren to say "good call". Exactly what he meant doesn't matter. Those words are only going to be taken one way in light of his previous comments.
It just goes to show how careful he's had to be all year. People have criticised him for going soft on Hinkley but he just can't say anything anymore. This is literally the whole concept of 'having the full support of the board'. You publicly have everyone's support until the moment they sack you.