Defences to Private Nuisance (AQA A-Level Law): Revision Notes

Defences to Private Nuisance

Private nuisance claims can be defended using several established legal defences. Understanding when these defences apply is crucial for exam success, as they often determine whether a defendant will be held liable for what might otherwise constitute an actionable nuisance.

Ordinary use of the land

A defendant can successfully argue that their actions do not amount to a nuisance if they are simply making ordinary use of their property. This defence recognises that everyday activities, even if they cause some disturbance to neighbours, should not be restricted by law.

The principle established is that defendants cannot be liable for nuisance when they are simply using their property in a normal, reasonable manner that any occupier might be expected to use it.

This defence balances the competing rights of landowners - recognising that people must be able to live normal lives without fear of legal action, whilst also protecting individuals from unreasonable interference.

Statutory authority

Many activities that might otherwise constitute nuisances are carried out by public authorities or private companies acting under powers granted by Parliament. For example, roadworks to repair infrastructure, construction of motorways, or operation of airports all create disturbance but may be legally authorised.

Statutory authority provides a complete defence to a nuisance claim, provided the defendant can demonstrate two key elements:

1. They were acting under a specific statutory power or duty
2. The nuisance created did not exceed what was authorised by the statute

The key authority is Allen v Gulf Oil Refining Ltd (1981), which established the scope and limits of this defence. The court will examine the statute carefully to determine exactly what Parliament authorised and whether the defendant stayed within those boundaries.

Act of God and nuisances arising naturally

Act of God

An Act of God refers to an extraordinary natural event that occurs without any human intervention and could not reasonably have been foreseen or prevented. Examples include severe storms, earthquakes, or exceptional flooding.

When a nuisance is caused entirely by such a natural event, the defendant has a complete defence, as established in Nicholls v Marsland (1875). The rationale is that it would be unjust to hold someone liable for damage they could not possibly have prevented or anticipated.

However, this defence has important limitations, as demonstrated in Goldman v Hargrave (1967). This case established that once an occupier becomes aware of a nuisance arising from natural causes on their land, they come under a duty to take reasonable steps to remedy it within a reasonable timeframe.

What constitutes reasonable action?

Prescription

Prescription is a defence based on long-term acquiescence - essentially, if a nuisance has continued for a sufficiently long period with the claimant's knowledge, the defendant may acquire a legal right to continue it.

Requirements for the defence

To successfully claim prescription, a defendant must prove:

1. The nuisance has continued for 20 years or more
2. The claimant has been aware of the nuisance throughout this period
3. The claimant has taken no action to stop it
4. The use has been continuous and consistent

The modern application of prescription was considered in Coventry v Lawrence (2014), which examined when and how a prescriptive right to commit a nuisance might arise.

Practical application

Exam technique for private nuisance defences

When applying these defences in exam answers, follow these steps:

1. Identify the defence clearly by name
2. State the legal test or requirements for that defence
3. Cite key authority - use case names correctly
4. Apply to facts - show how the scenario fits (or doesn't fit) the legal requirements
5. Consider limitations - many defences have important exceptions

Evaluation points to consider:

• Do these defences strike a fair balance between competing property rights?
• Should ordinary use protect defendants even when neighbours suffer significant disturbance?
• Is 20 years too long for prescription - should long-suffering neighbours lose their rights?
• Does statutory authority give too much power to public bodies at the expense of individuals?

Defences to Rylands v Fletcher

While Rylands v Fletcher is a distinct tort from private nuisance, it shares some common defences. Understanding these helps provide a complete picture of liability for land-based torts.

Act of a stranger

The defendant has a complete defence if the escape was caused by a stranger's actions that were:

• Outside the defendant's control
• Not reasonably foreseeable

Act of God

This defence operates similarly to private nuisance, but the key authority is Carstairs v Taylor (1871). The escape must result from extraordinary natural forces beyond human control or reasonable foresight.

Statutory authority

As with private nuisance, defendants can rely on statutory authorisation if they were acting under Parliamentary powers. Green v Chelsea Waterworks Co. (1894) provides the key authority for this defence in Rylands v Fletcher claims.

Consent or benefit

If the claimant receives a benefit from the accumulated dangerous substance, they may be deemed to have consented to the risk of its escape. Peters v Prince of Wales Theatre (1943) established this principle - where both parties benefit from the arrangement, the claimant cannot later complain about the risk.