Does a worker have to be a union member to request to be accompanied by a trade union official at a disciplinary or grievance hearing?

No, a worker does not have to be a union member to request to be accompanied by a trade union official at a disciplinary or grievance hearing, but this is subject to the union official agreeing to appear on the worker's behalf. Unions often require a minimum period of membership before they will agree to provide a companion, to avoid workers joining the union only when they are faced with disciplinary action.