Charities, Guardians, and Snail Farms: Why Traditional Rate Mitigation Is Failing and What to Do Instead

Empty commercial property is expensive. Once Empty Property Relief (EPR) expires, owners face the full business rates bill on a building generating zero income. It is no surprise that a cottage industry of mitigation schemes has sprung up to soften the blow.

For years, the most popular approaches have involved charities, property guardians, or outright artifice. On paper, each has a logic to it. In practice, a growing body of evidence, government consultations, court rulings, and high-profile enforcement actions make clear that these models are in serious trouble.

Property owners who rely on them are exposed. There is a better, more sustainable path, and it does not require a single charitable lease, a guardian licence, or a crate of snails.

The Charity Model: How It Works (and How It Fails)

The mechanism is simple. A charity takes a lease on an empty property, usually at a peppercorn rent. In return, the property qualifies for mandatory charitable rate relief of 80%, with many councils topping that up to 100% through discretionary relief. The landlord typically pays the charity a fee or premium, funded from the rates savings.

In legitimate cases, a charity genuinely occupies and uses the space. But the model has been systematically exploited. The government’s own 2024 Business Rates Avoidance and Evasion Consultation confirmed that charity relief is particularly vulnerable to abuse, highlighting cases where owners lease properties to artificial charities used as vehicles to secure exemption.

The Local Government Association (LGA) estimates that business rates avoidance costs councils between £250 million and £300 million per year. Charity-based schemes account for a significant share of that figure.

The Public Safety Charitable Trust

The most notorious case remains The Public Safety Charitable Trust Ltd. This Chester-based organisation leased approximately 2,000 empty commercial premises across 240 local authority areas. Its method involved installing Bluetooth transmitters that broadcast crime-fighting messages to passers-by and offering free Wi-Fi. Landlords paid the Trust a premium from the rates savings they made.

The High Court ruled in May 2013 that the Trust was not entitled to charitable relief. The Companies Court ordered it wound up two months later. Three councils alone were owed over £2.2 million. The Charity Commission found the trustees had undermined the meaning of charity. Both former trustees were subsequently banned from holding company directorships, one for nine years.

The Trust enabled businesses to avoid an estimated £17 million in rates. That is £17 million stripped from local authority budgets that fund public services.

Kenya Aid Programme v Sheffield City Council

If Public Safety Charitable Trust was the headline-grabbing collapse, Kenya Aid Programme v Sheffield City Council [2013] EWHC 54 (Admin) is the quieter judgement that put the boot in on the whole “a charity is occupying it, so job done” school of thinking. The charity had taken leases on two industrial units at Europa Way in Sheffield and used them to store donated furniture destined for schools in Kenya. When Sheffield chased unpaid rates, the charity claimed the 80% mandatory relief on the basis that the premises were “wholly or mainly used for charitable purposes” under section 43(6) of the Local Government Finance Act 1988.

The High Court disagreed. The district judge had found that no more than 50% of either unit was actually in use. Treacy LJ held that occupation on its own is not enough, and that the magistrates were entitled, and indeed required, to look at the extent of the use as well as its purpose. The case was sent back for reconsideration and Kenya Aid Programme ultimately contributed to a rates bill running to the millions.

The principle that flowed from that judgement is now firmly established. It is not enough to put a charity’s name on the door, move a few boxes in, and call it occupation. Councils and courts will look at how much of the building is genuinely in use, and they will treat token or partial occupation exactly as it looks.

Pop-Ups and Art Exhibits

Kenya Aid does not only cut down charity schemes. It also undermines a quieter but popular variant: the pop-up shop or short-term art exhibit. The mechanics are familiar. An owner invites a pop-up trader or a curator to occupy an otherwise empty unit for a short period, often rent-free or for a nominal fee. Once the occupation is over, a fresh round of Empty Property Relief is claimed on the basis that the building has been reoccupied and the clock reset.

Two problems. First, the 2024 reforms doubled the reset period from six weeks to thirteen. A pop-up calibrated to the old regime now has to run for more than three months to achieve anything, which is often longer than the trader wants or the commercial context permits. Second, Kenya Aid sets a decisive ceiling on what counts as occupation. If a curator hangs a dozen canvases in a 20,000 square foot warehouse, the extent-of-use test bites hard. The same applies to a pop-up that only uses a corner of a much larger unit. Partial, token, or symbolic occupation is not occupation in the sense the statute recognises.

For charity-linked pop-ups the position is worse still. The government’s proposed tightening of the “next in use” exemption introduces a minimum six-month period of charitable use before the relief can be claimed on a subsequent vacant period. A fortnight-long art exhibit, however well-intentioned, will not come close.

Property Guardians: The Hidden Risk

Property guardians are often presented as a win-win: the owner gets someone on-site to deter squatters and vandals, the guardian gets cheap accommodation, and business rates liability is supposedly reduced. The reality is considerably messier.

You Do Not Know Who You Are Getting

Guardian companies recruit from a broad pool. Guardians are typically students, key workers, or young professionals looking for affordable living. Property owners have little to no say over who occupies their building. The London Assembly’s housing committee found that guardian-occupied properties frequently suffer from poor conditions, with 22% of complaints relating to repairs and maintenance and 37% citing mould and condensation. When multiple guardians share a large commercial building, wear and tear escalates quickly, and the owner has limited visibility or control over the day-to-day state of the property.

For owners of high-value commercial assets, handing the keys to unknown individuals and hoping for the best is a significant gamble. Unlike a standard commercial tenant with a track record and covenant strength, guardians are transient occupiers with no material stake in the building’s condition.

Wear and Tear on Commercial Property

Commercial buildings are not designed for residential use. Plumbing, electrical systems, fire safety provisions, and internal finishes are all built to commercial specifications. Putting people in them as residents accelerates deterioration. Guardian properties in Bristol have reported years of living with no functioning hot water. In London, properties have been found with wholly inadequate sanitary facilities for the number of occupants. Every month of guardian occupation is a month of residential-grade wear on a commercial-grade building.

Licences, Not Tenancies: The Legal Contortion

Guardian schemes sit on a careful legal tightrope. The reason guardian companies insist on “licence” agreements rather than tenancies is that the House of Lords made the distinction decisive in Street v Mountford [1985] AC 809. Lord Templeman held that where a person is given exclusive possession of residential accommodation for a term at a rent, a tenancy arises regardless of what the parties choose to call it. Labels do not matter. Substance does.

If guardians were granted tenancies, two things would follow. They would acquire security of tenure and the usual statutory protections, making them hard to remove when the owner wants the building back. And they would be in exclusive occupation of the property in the legal sense, which is one of the ingredients that determines who is in rateable occupation.

To avoid both outcomes, guardian companies structure agreements so that guardians share common parts, have no right to a specific room, can be moved at short notice, and perform quasi-security duties for the owner. The goal is to keep them firmly on the licence side of the Street v Mountford line. That preserves flexibility for the owner, but it is also exactly why, under the classic test in LCC v Wilkins [1957] AC 362, guardians cannot be treated as the rateable occupier. Rateable occupation requires four ingredients: the occupation must be actual, exclusive for the occupier’s own purposes, of benefit, and not too transient. Guardians fail the exclusivity limb almost by definition, because the owner deliberately retains overarching control.

That internal contradiction is what Southwark LBC v Ludgate House Ltd [2020] EWCA Civ 1637 finally resolved. Looking at the real arrangement rather than the paperwork, the Court of Appeal found the guardians were performing a security function for the owner’s benefit and that the owner retained “general control” of the building. The owner, not the guardians, was the rateable occupier. The very structure that let guardian companies avoid granting tenancies turned out to be the thing that prevented them from shifting the rates liability.

Difficult to Remove

Guardians typically occupy under licence agreements rather than tenancies, which in theory means shorter notice periods than a standard tenancy. But the line between a licence and an assured shorthold tenancy is not always clear-cut. If a guardian occupies a specific room with a lock, pays regular fees, and has been there for an extended period, a court may find they have tenancy rights, entitling them to a minimum of two months’ notice and a court order. Even under a straightforward licence, the minimum notice is four weeks, and if the guardian does not leave, the owner still needs to obtain a court order.

The picture gets worse if the building qualifies as a House in Multiple Occupation (HMO). If the property is not properly licensed, guardians can apply for a Rent Repayment Order, as established in a 2019 London Property Tribunal decision. Suddenly the savings from avoided rates are dwarfed by repayment claims.

The Rest of the Rogues’ Gallery

Snail Farms

Snail farms involve placing sealed crates containing a handful of snails inside a vacant commercial building and claiming agricultural exemption from rates. Westminster City Council has taken legal action against multiple snail farm operations, reporting losses of around £370,000. In Liverpool, investigators found 15 covered crates, some containing as few as two snails each, inside a building where the owner was avoiding £61,000 in rates. Courts have repeatedly struck down these arrangements as shams, including a notable High Court and Court of Appeal ruling in a Leeds case.

Box Shifting

Then there is box shifting, where landlords cycle token goods in and out of properties to repeatedly trigger EPR resets. The End Rates Avoidance campaign, backed by around 100 councillors and MPs, estimates this practice alone costs councils £250 million annually.

Government Is Tightening the Screws

The direction of travel from government is unmistakable. The 2024 consultation response delivered several concrete reforms and signalled more to come.

EPR reset period doubled. From April 2024, the reset period extended from six weeks to thirteen weeks, directly targeting box shifting and short-cycle occupation schemes.

Charity relief under review. The government has explored granting the Charity Commission enhanced enforcement powers, tightening eligibility criteria, and defining occupation by percentage of floor space actually utilised.

A General Anti-Avoidance Rule. A further consultation has been announced on introducing a General Anti-Avoidance Rule (GAAR) for business rates in England, mirroring the approach already used in income tax and corporation tax.

For property owners, the message could not be clearer: the old playbook is under sustained regulatory pressure, and the risk profile is rising with every policy cycle.

Advertising Mitigation: A Different Approach Entirely

So what does a compliant, sustainable alternative look like?

Advertising-based mitigation takes a fundamentally different approach. Rather than relying on charitable status, guardian occupation, or agricultural exemptions, it establishes genuine beneficial occupation through technology.

The model works by installing WiFi infrastructure in a vacant property, creating a functioning advertising portal that serves local businesses and the surrounding community. The property is occupied, connected, and actively in use. There is no reliance on charitable relief, no need for a third-party charity to take a lease, no guardian licence agreements, and no question of artificial or token occupation.

This approach is grounded in established case law. In Makro v Nuneaton (2012), the courts confirmed that minimal occupation qualifies as beneficial occupation. POLL v Trafford (2018) established that occupation undertaken specifically for mitigation purposes is legitimate. And in City of London v 48th Street (2025), intermittent occupation schemes were upheld.

The key distinction is straightforward: advertising mitigation does not depend on relief, exemption, or putting people in your building. It resets EPR by demonstrating real occupation, which is exactly what the legislation was designed to recognise.

Why the Difference Matters

Regulatory risk. Charity schemes face active government intervention. Guardian schemes have been undermined by the Court of Appeal. Advertising mitigation operates within the existing statutory framework for occupation, not within an exemption regime that is being reformed or a model the courts have rejected.

Property risk. Guardians introduce wear and tear, HMO compliance obligations, and potential eviction complications. Technology-based occupation involves installing equipment, not housing people. The property remains in the owner’s full control.

Reputational risk. Being associated with a scheme the Charity Commission describes as undermining the meaning of charity, or worse, a snail farm, is not a good look for institutional landlords, agents, or asset managers. Technology-led occupation carries none of that baggage.

Sustainability. Charity arrangements depend on mandatory relief that may be curtailed. Guardian schemes depend on a legal framework the Court of Appeal has dismantled. Advertising mitigation is not exposed to either risk because it claims no relief and houses no one.

Simplicity. No charitable leases, no guardian licences, no HMO compliance, no third-party trustees. A plug-and-play installation, evidence of occupation, and a reset.

The Bottom Line

The traditional mitigation playbook was always built on borrowed time. Whether it is charities wound up by the courts, guardians rejected by the Court of Appeal, or snail farms raided by council investigators, the pattern is the same: schemes that rely on artifice or exemption are being systematically dismantled.

Property owners do not need to take that risk. Technology-led advertising mitigation delivers genuine occupation, genuine savings, and a defensible position grounded in case law rather than loopholes. It works not because it games the system, but because it does exactly what the legislation asks: it puts an empty building back to use.