Introduction
A mortgage is one of the most common forms of security for a debt, where a borrower (the mortgagor) grants an interest in their property to a lender (the mortgagee) in exchange for a loan. Central to the law of mortgages is the equitable principle encapsulated in the maxim, "once a mortgagor, always a mortgagor". This principle establishes that the fundamental purpose of a mortgage is security for a loan, and it should not be an instrument of oppression or a means for the mortgagee to acquire the mortgagor's property. The maxim protects the mortgagor's ultimate right to repay the debt and reclaim their property free from the mortgage. This is known as the equity of redemption.
This essay will discuss the meaning and application of this maxim. It will explore the core concept of the equity of redemption and examine how the courts of equity have historically intervened to strike down terms in a mortgage agreement that 'clog' or 'fetter' this right. The discussion will be supported by an analysis of key case law that illustrates how the courts have dealt with attempts to postpone redemption, grant the mortgagee an option to purchase the property, or secure other collateral advantages. Finally, the essay will consider the role of modern statutory provisions in protecting mortgagors, which supplement the traditional equitable rules.
The Equity of Redemption
The equity of redemption is the sum total of the mortgagor’s rights in the property subject to the mortgage. At its core is the right to redeem the property upon repayment of the debt, interest, and any costs. Historically, common law was strict: if the mortgagor failed to repay the debt on the legal date for redemption, they would lose the property to the mortgagee forever, regardless of how much had been repaid. Equity found this outcome to be harsh and unjust, viewing the property as mere security for the debt. Therefore, equity stepped in to allow the mortgagor to redeem the property even after the legal date for redemption had passed.
This collection of rights is protected fiercely. As explained by Lord Parker in Kreglinger v New Patagonia Meat and Cold Storage Co Ltd (1914), the equity of redemption is a crucial right that must be preserved. The court will not permit any term or 'clog' that prevents the mortgagor from getting their property back in the state it was in before the mortgage, once the debt is paid.
Clogs and Fetters on the Right to Redeem
The courts have identified several types of contractual terms that can operate as a 'clog' or 'fetter' on the equity of redemption. Any such term is generally considered void.
Postponement of the Right to Redeem
A mortgage agreement will always specify a date for redemption. While a mortgagee is entitled to have their investment secured for a reasonable period, a clause that postpones the date of redemption for an excessively long time may be struck down if it renders the right to redeem illusory or is oppressive.
The courts draw a distinction between commercial mortgages and domestic mortgages. In Knightsbridge Estates Trust Ltd v Byrne (1939), a mortgage between two commercial entities included a term that postponed redemption for 40 years. The mortgagor argued this was an unreasonable clog. The Court of Appeal disagreed, holding that as it was a commercial agreement between two parties of equal bargaining power, and the terms were not unconscionable, the 40-year postponement was valid.
This can be contrasted with the case of Fairclough v Swan Brewery Co Ltd (1912). Here, a mortgage was taken out on a leasehold property which had 20 years left to run. The mortgage contract stipulated that redemption could not take place until six weeks before the lease expired. The Privy Council held that this term was a clog on the equity of redemption. By the time the mortgagor could redeem, the leasehold estate would be practically worthless. The right to redeem was, for all practical purposes, illusory. Therefore, the mortgagor was permitted to redeem the property earlier. These two cases show that the validity of a postponement clause depends on the facts, particularly the nature of the property and the parties.
Options to Purchase the Mortgaged Property
A term that grants the mortgagee an option to purchase the mortgaged property is generally considered a classic example of a clog on the equity of redemption. If the mortgagee were able to exercise such an option, the mortgagor would be prevented from ever redeeming their property, which defeats the entire purpose of the mortgage as security.
In Samuel v Jarrah Timber and Wood Paving Corporation Ltd (1904), a company borrowed money and, as part of the mortgage transaction, granted the lender an option to purchase the mortgaged company stock at a set price within 12 months. The company sought to redeem the loan early, and the lender tried to exercise the option. The House of Lords held that the option was void. Even though the agreement was not considered oppressive, the long-standing rule of equity that a mortgagee cannot have an option to purchase the mortgaged property as part of the same transaction had to be applied. The court felt that any other outcome would render the maxim "once a mortgagor, always a mortgagor" meaningless. However, if the option is granted in a separate and independent transaction from the mortgage itself, it may be held as valid, as was the case in Reeve v Lisle (1902).
Collateral Advantages
A collateral advantage is a benefit that the mortgagee secures in addition to the repayment of the loan plus interest. An example is a 'solus tie', common in mortgages granted by breweries to pub landlords, where the mortgagor agrees to buy all their supplies from the mortgagee. The traditional view was that any such advantage that continued after the mortgage was redeemed was void.
However, the modern position is more flexible, as established in the landmark case of Kreglinger v New Patagonia Meat and Cold Storage Co Ltd (1914). In this case, a meat company borrowed money from woolbrokers. The agreement gave the brokers a right of first refusal to buy any sheepskins produced by the company for five years. The company repaid the loan after two years and argued that the sheepskin agreement should end. The House of Lords held that the agreement could continue for the full five years. The court reasoned that the sheepskin agreement was not a clog on redemption but a separate and independent commercial deal. Lord Parker set out a test: a collateral advantage is valid if it is not unfair or unconscionable, not in the nature of a penalty clogging the equity of redemption, and not inconsistent with the right to redeem.
This can be contrasted with the earlier case of Noakes & Co Ltd v Rice (1902), where a pub landlord mortgaged his leasehold pub to a brewery. The mortgage included a term that the landlord would only buy liquor from the mortgagee's brewery for the entire duration of the lease, even after the mortgage was redeemed. The House of Lords struck down this term, reasoning that it 'clogged' the equity of redemption because if the tie continued after redemption, the mortgagor would not get his property back in the same condition as when he mortgaged it; it would still be subject to the tie. The property he would get back would be a 'tied' pub, not a 'free' pub.
Statutory Provisions and Modern Regulation
While the equitable doctrines remain important, their role in protecting mortgagors, particularly residential ones, has been supplemented by statutory controls. The Unfair Contract Terms Act 1977 and, more recently, the Consumer Rights Act 2015 (CRA 2015) provide a framework for assessing the fairness of terms in consumer contracts. A mortgage between a lender and a homebuyer is a consumer contract. Under the CRA 2015, an unfair term in a consumer contract is not binding on the consumer. A term is considered unfair if, contrary to the requirement of good faith, it causes a significant imbalance in the parties' rights and obligations to the detriment of the consumer. This statutory regime provides a more structured and perhaps more predictable means of challenging oppressive terms than relying solely on the sometimes-complex equitable doctrines of clogs and fetters.
Furthermore, the mortgage market is now heavily regulated. The Financial Services and Markets Act 2000 established a regulatory framework, with the Financial Conduct Authority (FCA) now responsible for regulating mortgage lending. The FCA's rules are designed to ensure that lenders treat their customers fairly, providing another layer of protection for mortgagors that goes beyond the traditional equitable principles.
Conclusion
The maxim "once a mortgagor, always a mortgagor" continues to be a foundational principle in the English law of mortgages. It ensures that the primary purpose of a mortgage remains security for a loan, protecting the mortgagor's invaluable right to redeem their property. The courts of equity have developed a body of case law that strikes down terms that attempt to 'clog' this right, whether by making redemption illusory, granting the mortgagee an option to purchase, or imposing collateral advantages that unfairly persist after redemption.
While the judiciary has shown an increased willingness to uphold commercially negotiated terms between parties of equal bargaining power, the core protection remains robust, especially for vulnerable mortgagors. The traditional equitable doctrines now operate alongside a comprehensive statutory framework, including the Consumer Rights Act 2015 and the regulatory regime overseen by the FCA. Together, equity and statute ensure that while a person may become a mortgagor to secure a loan, the law will not allow the mortgage to be used as a device to prevent them from one day reclaiming their property, thus confirming the enduring relevance of the age-old maxim.
References
Cases:
- Fairclough v Swan Brewery Co Ltd [1912] AC 565
- Knightsbridge Estates Trust Ltd v Byrne [1939] Ch 441
- Kreglinger v New Patagonia Meat and Cold Storage Co Ltd [1914] AC 25
- Noakes & Co Ltd v Rice [1902] AC 24
- Reeve v Lisle [1902] AC 461
- Samuel v Jarrah Timber and Wood Paving Corporation Ltd [1904] AC 323
Legislation:
- Consumer Rights Act 2015
- Financial Services and Markets Act 2000
- Unfair Contract Terms Act 1977

