Where, on an application by a creditor under paragraph 11 above, the court is satisfied (on grounds other than those on which a petition under paragraph 7(1)(b) above was or could have been presented by that creditor) that the intromissions of the trustee under the protected trust deed with the estate of the debtor have been so unduly prejudicial to that creditor’s claim that he should not be bound by the discharge it may order that he shall not be so bound.