Knightsbridge Estates Trust Ltd v Byrne [1939] Ch 441
Repayment period of forty years in mortgage deed not unreasonable
Facts
The plaintiff company granted a mortgage to the defendant’s insurance company. The mortgage deed provided for repayment in eighty instalments over a period of forty years. The plaintiff sought a declaration that, notwithstanding the repayment provisions, they were entitled to early redemption of the mortgage upon payment of the principal sum secured thereunder, with interest to the date of redemption and proper costs.
Issues
At first instance, it was held that the period of postponement for redemption for forty years constituted a clog on the equity of redemption and the plaintiff company was entitled to the declaration sought. The defendants appealed. They argued that the doctrine of the clog on the equity of redemption was intended to deal with the case of an impecunious landowner and unscrupulous lender which did not apply in the present circumstances.
Decision/Outcome
The Court of Appeal allowed the appeal. The Court observed that this was a proper business transaction which had none of the features of an oppressive bargain where the borrower is at the mercy of an unscrupulous lender. The Court refused to find that the repayment period of forty years was “unreasonable” in the circumstances. According to the Court, equity is concerned that the essential requirements of a mortgage transaction are observed and that oppressive or unconscionable terms are not enforced. Otherwise, it does not interfere with a commercial bargain. The Court declined to treat the relevant provisions in the mortgage deed as unreasonable where the deed was entered into by two parties such as those involved, who had acted with the assistance of competent advisers.
274 words
Updated 19 March 2026
This case summary remains accurate. Knightsbridge Estates Trust Ltd v Byrne [1939] Ch 441 is a well-established authority on the doctrine of clogs on the equity of redemption and continues to be cited in English land law for the proposition that a postponement of the right to redeem will not be struck down merely because it is lengthy, provided it is not unconscionable or oppressive. The underlying principles described in the article remain part of current English law. It should be noted, however, that the broader doctrine of clogs on the equity of redemption has been subject to judicial scrutiny in more recent years, most notably in Jones v Morgan [2001] EWCA Civ 995, where the Court of Appeal described the doctrine as ‘an appendix to our law which serves no useful purpose and would be better excised.’ The Law Commission has also previously questioned the continuing utility of the doctrine. While the doctrine has not been abolished and this case retains its authority, students should be aware that its future may be uncertain and that modern courts approach it cautiously. No statutory change has removed or replaced the relevant principles as they apply to this case.
