For years, a report on how the Royal Bank of Scotland allegedly forced hundreds of small businesses to the wall has been kept under wraps.

Despite repeated requests, the Financial Conduct Authority, which regulates banks, has refused to publish its full findings on the scandal, releasing only a summary last autumn.

Tomorrow, MPs are expected to use parliamentary privilege to make it public at last, against the regulator’s wishes. We have seen a leaked copy of that report. Campaigners believe it paints a damning picture of the bank’s behaviour, raising serious questions about the judgement of the regulator in withholding it.