Ben only managed to show himself up as a complete coward - if he didn't know what James had done, then he also couldn't have known what Yasmina had done and should have brought them both in. Instead he went to Norul, because he realised SAS didn't like him, and James as a backup as someone he could out shout and might fold under pressure, which Yasmina is unlikely to do.
At SAS's gobsmacked expression he dithered and went for Debra in a panic - she'd spoken out against him, whilst Yasmina had been quieter so Debra was more in his mind - but he no way wanted to bring her in, he was terrified at the prospect (and to be fair, Debra terrifies me as well

). His card is well and truely marked now, next time in boardroom, he's a gonner!
Mind you, it was worth it for James' 'What' and hand over his mouth - I love this guy, he's a total sweetheart