Post Office Horizon inquiry set to be given statutory status with wider powers The government inquiry into the Post Office Horizon scandal is set to be made statutory with the power to call witnesses under oath and compel provision of evidence Share this item with your network: By Published: 18 May 2021 16:53 The government inquiry into the Post Office Horizon scandal is set to be made statutory with the power to compel witnesses and evidence. According to Sky News, the government will soon announce that the current inquiry led by Sir Wyn Williams will be given statutory status, widening the powers available to the former High Court judge. Such a move would temper fears among victims and campaigners that the existing probe is a "whitewash."