If the 'official' reason for the suspension is not dealing with the retained list, then I think its reported that they also refused when TB asked them to do it.
If that's all that there is to his sacking, then a) seems a weak case for dismissal in front of a tribunal (refusing to deal with contracts aside, although that may be interpreted as a symptom of breakdown in relationship), and 2) why couldn't the board just let him get on with his job which he...