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Are contract amendments agreed during lockdown legally binding?

06 May 2020

Performing obligations in commercial contracts during the Government enforced lockdown is a challenge. Sometimes that challenge is so great that it is the catalyst for the breakdown of a business relationship. To avoid remaining bound by onerous obligations parties have felt compelled to terminate some contracts.

However, where the relationships are stronger and there is a common desire to get through the restrictions imposed during lockdown, the focus may turn to how might the contractual terms be varied to ensure that both parties survive and are able to recommence mutually beneficial business when the world returns to some sort of normality. Such a constructive approach to what we all hope are short-term difficulties is to be encouraged. However, contracting parties should exercise care; amending the terms of a contract requires careful thought and precise execution – a business will not wish to survive lockdown only to discover that amendments to a commercial contract it thought had been agreed are of no legal effect.  

Generally, contracting parties can make legally enforceable variations to their contract by mutual agreement provided that:  

  • there is “consideration” for the variation (unless the variation is made by a properly executed 
    deed); and  
  • the parties comply with the terms of the existing contract specifying how variations may be 
    made; and  
  • the variations comply within any applicable law. 

Any business proposing variations to a commercial contract should have regard to these three key points.  


An essential element of contract law is that the recipient of a promised benefit must have given something of value in return for that promise. If A promises to do something for B, then B can only force A to deliver what was promised if B has promised to give something in return. Without the promise from B there is no consideration and a court will not order A to fulfil his promise. 

Promises of performance given by the contracting parties do not need to be of equal value, but they do both need to have some value. This is why you will often see contracts containing words along the lines of: “in consideration for the payment of £1 by A to B, B agrees to do X, Y and Z”. 

Usually, simply agreeing to do the things a party is already obliged to do under the contract will not amount to “good consideration”. That is commonly referred to as “past consideration”. If A fails to give “good consideration” it may not be possible to compel B to deliver anything promised by a variation which was in addition to the things B was already obliged to do under the contract. 

But a note of caution – things are rarely that simple and “usually” means that there will be instances when what appears to be “past consideration” is found to be “good consideration”. For example: if A has good reason to doubt that B will perform his obligations under the terms of the existing contract and offers to pay a bonus if B will complete his obligations within the timeframe specified in the contract - B may be able to demand payment of that bonus. Provided A received some benefit or avoided a detriment (such as being liable to pay a penalty to a third party under a related contract if B didn’t perform its’ obligations on time) then a court may order the bonus payment to be made even though B simply complied with the original contact. 

Variations should be made in accordance with existing contractual requirements 

When contemplating amending a commercial contract, it is important to consider whether the contract contains express terms detailing procedures the parties agreed to follow when amending any term of the contract. 

It is not uncommon for contracts to include a provision along the lines of: “the terms of this contract can only be amended if the amendment is agreed in writing and signed by the parties”. The rationale for such clauses is usually that both parties had a desire to prevent variations being “agreed” by unauthorised representatives and wished to ensure that a written record of all variations was created in order to avoid disputes about the precise terms of any variations. Such clauses, often called “No Oral Modification” or “NOM” clauses have been upheld and courts have refused to enforce variations when the parties have not complied with the requirements of the contract. 

Nevertheless, it is fair to say that a failure to comply with the formal requirements of the contract may not be fatal to the enforceability of the variation, especially where a party acts in accordance with the variation or where the parties never dispute what they agreed. However, failure to comply with the requirements of the contract carries the risk that A is dependent on B not taking a technical point in the future – potentially when the pressure created by lockdown has eased. 

We suggest that wherever possible parties should avoid putting themselves in the position of being forced in the future to deal with a dispute concerning a variation. Such disputes can be expensive, time consuming and may require a party to contend that the variation is so fundamental that it is in reality a new contract rather than a variation or that it is inequitable for one party to resile from a variation that has been acted on by the other party.  

The law requires some variations to be made in a particular way 

In the vast majority of cases, contractual variations may, as a matter of law, be made orally. However, the law does require certain contracts, and any variations to those contracts, to be in writing and sometimes to be by deed rather than a simple contract. It isn’t practical to try and identify each and every scenario in which the law imposes such conditions. As a starting point, if an agreement is made by a deed it will be worth spending a little time checking why this is the case. Is it, for example, to avoid the risk of the terms being unenforceable due to a lack of consideration or is it because it is required by law? 

Some contracts must be in writing, and therefore any variations must also be in writing. These include: 

  • contracts for the sale of land (which must be in a deed) 
  • leases (if they exceed a term of 3 years) 
  • the appointment of trustees 
  • a legal assignment for the benefit of a contract 
  • any assignment of most intellectual property rights 
  • guarantees 

Although these circumstances are potentially limited, it is prudent to check the position so that any agreed variation isn’t unenforceable because it wasn’t made in the required format. 


We know times are difficult, and we recognise that there can be short-term and long-term benefits by contracting parties cooperating to ensure they both survive the impact of the lockdown. However, an apparent spirit of cooperation during difficult times may not carry over to the harsh realities of the  commercial world as we return to some sort of normality. It is therefore worth adopting a measured approach and to ask three simple questions when contemplating contractual variations intended to ensure survival during the lockdown:

  1. is there “good consideration” passing between the parties?
  2. are there existing contractual requirements to vary the terms? 
  3. does the law require the variation to be made in a particular way?  
If we can assist in relation to any contemplated variations, we would be very happy to do so and would encourage consideration of our “LS Unlock” initiative setting out the financial possibilities on which we may be able to provide advice. 

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