“In accordance with the authority of Thwaite v Thwaite the court may consider the order and refuse to enforce the order if it is inequitable to do so. Where such an outcome is determined it is open to the court to determine the matter afresh”
“Where the order is still executory, as in the present case, and one of the parties applies to the court to enforce the order, the court may refuse if, in the circumstances prevailing at the time of the application, it would be inequitable to do so: Mullins v. Howell(1879) 11 Ch D 763 and Purcell v. F. C. Trigell Ltd.[1971] 1 QB 358 , 366, 367. Where the consent order derives its legal effect from the contract, this is equivalent to refusing a decree of specific performance; where the legal effect derives from the order itself the court has jurisdiction over its own orders: per Sir George Jessel M.R. in Mullins v. Howell(1879) 11 Ch D 763 , 766.”
“I have no doubt that the Court has jurisdiction to discharge an order made on motion by consent when it is proved to have been made under a mistake, though that mistake was on one side only, the Court having a sort of general control over orders made on interlocutory applications.”
“But there is no ground here so far as I can see for setting aside this consent order. It was deliberately made, with full knowledge, with the full agreement of the solicitors on both sides. It cannot be set aside. But, even though the order cannot be set aside, there is still a question whether it should be enforced. The court has always a control over interlocutory orders. It may, in its discretion, vary or alter them even though made originally by consent.”
“An undertaking is a solemn promise which a litigant volunteers to the court. A court has no power to impose any variation of the terms of a voluntary promise. A litigant who wishes to cease to be bound by her (or his) undertaking should apply for “release” from it (or “discharge” of it); and often she will accompany her application for release with an offer of a further undertaking in different terms. The court may decide to accept the further undertaking and, in the light of it, to grant the application for release. Equally the court may indicate that it will grant the application for release only on condition that she is willing to give a further undertaking or one in terms different from those of a further undertaking currently on offer. In either event the court’s power is only to grant or refuse the application for release; and, although exercise of its power may result in something which looks like a variation of an undertaking, it is the product of a different process of reasoning.”
“An application to set aside a financial remedy order should only be made where no error of the court is alleged. If an error of the court is alleged, an application for permission to appeal under Part 30 should be considered. The grounds on which a financial remedy order may be set aside are and will remain a matter for decisions by judges. The grounds include (i) fraud; (ii) material non-disclosure; (iii) certain limited types of mistake; (iv) a subsequent event, unforeseen and unforeseeable at the time the order was made, which invalidates the basis on which the order was made.”