Thanks - I will get him to speak to ACAS. As a witness though, I would have thought you were involved as you cannot interview yourself and give a completely unbiased account.

My partner's employer has started disciplinary action against him for alleged gross misconduct (which he did not do). He is faced with an informal fact-finding meeting next week and the person who will be conducting the meeting is the accuser as well as an alleged witness to the situation. Does anybody have any idea about whether this is acceptable or not as it would seem that having an involved party conduct the investigation means that it won't be heard fairly.