What happened: The High Court ruled that Oxford University colleges' COVID-19 business interruption losses are not covered under their Aviva policies because an exclusion clause for disease outside a five-mile radius applied.
Who's involved: Colleges and halls of the University of Oxford (claimants) and Aviva Insurance Limited (insurer)
What's at stake: Business interruption cover under a Disease Clause with a £1 million sum insured per policy
Why it matters: The ruling is the first to uphold an express disease-radius exclusion post-FCA Test Case, confirming that insurers who wrote the exclusion into their policies can rely on it.
Where it stands: Preliminary issues decided October 30, 2026; the broader claim continues but cover is effectively defeated.
Aviva did exactly what the Supreme Court said insurers should do if they wanted protection from pandemic claims. And it worked.
The Commercial Court has ruled that Aviva Insurance Limited - the UK's largest general insurer - does not have to pay COVID-19 business interruption losses claimed by colleges and halls of the University of Oxford. The reason: a clause in their policies expressly excluded cover where the pandemic spread beyond a five-mile radius of the insured premises.
The decision, handed down on October 30, 2026, came down to whether a single exclusion clause was strong enough to override what would otherwise have been valid cover. Under insurance law, when a loss has two causes acting at the same time - one covered by the policy, one not - the outcome depends on whether the uncovered cause was expressly excluded. If it was, the exclusion wins and the insurer does not pay. The court found Aviva's clause was exactly that kind of exclusion.
The colleges' Commercial Combined Policies covered business interruption losses following a specified disease occurring at the insured premises or within five miles of them. COVID-19 was brought within the policy's specified disease cover from March 5, 2020, when it became a notifiable disease. Nobody disputed that COVID cases occurred within five miles of the colleges. Nobody disputed that cases also occurred well beyond. Both sides agreed, for the purposes of this trial, that the losses were caused by cases inside and outside the radius at the same time.
Aviva pointed to clause 3(a) of the Disease Clause, which said the insurer would "not provide cover" for losses "caused by any occurrence of a Specified Disease not at The Premises or not within the distance in miles from the boundary of The Premises stated in The Schedule."
The colleges ran three arguments against it. All three failed.
The first was a close reading of the words "any premises" in the lead-in to clause 3. The colleges argued that because the clause referred to "reduction in the turnover of any premises" - lowercase, no definite article - it only applied to premises other than those listed in the policy schedule. That would make clause 3(a) irrelevant to their claim for lost revenue.
The court was not persuaded. This reading, it found, would make the clause "completely otiose" - serving no purpose at all. It also noted that the colleges' own lawyers took nearly six years from their first claim in March 2020 to land on this reading. It had not appeared in the particulars of claim or in the extensive correspondence between the parties' solicitors, surfacing only in a reply filed in November 2025 before becoming the "primary case" in a skeleton argument served in September 2026.
"If it took experienced, and possibly pedantic, lawyers nearly six years to arrive at the 'any premises' argument," the court observed, "the suggestion that this is what clause (3) would be understood to mean by a reasonable person reading it at the time seems rather unlikely."
The second argument was that clause 3(a) was not a genuine exclusion at all - just a restatement of the limits already set by the coverage clause - and so could not trigger the rule that lets an exclusion override otherwise valid cover. The court rejected this too, finding that the clause sat alongside other exclusions, all governed by the same opening words "We will not provide cover," and that treating it as anything other than an exclusion would leave it "not doing anything at all."
The third argument asked the court to read the word "solely" into clause 3(a), so that the exclusion would only apply where COVID cases outside the radius were the sole cause of loss. The court declined. Adding "solely" would strip the clause of any purpose, since the coverage clause already required an occurrence within the radius to trigger cover in the first place.
The ruling traces directly back to the FCA Test Case of 2021, where the Supreme Court held that insurers without an express exclusion for disease outside the policy radius could not avoid paying by pointing to the fact that the pandemic also raged beyond it. The court in that case effectively told insurers: if you want protection, write it into the policy.
Aviva had done so. The court found that Aviva "was only doing what the Supreme Court said it should do in the FCA Test Case if it wished not to be liable for widespread disease."
The court also pointed out that a five-mile radius from the centre of Oxford covers more than 78 square miles - "meaningful and quite extensive cover" for most specified diseases. That the cover did not stretch to a nationwide pandemic was, in the court's view, not an unreasonable limit for the insurer to impose.
The ruling resolves two preliminary issues on how the policy should be read. The underlying claim continues, but the practical effect is stark: the colleges' COVID business interruption losses are not covered under the Disease Clause. Whether the colleges will appeal remains to be seen.
For coverage teams and brokers reviewing legacy pandemic wording, the case is a worked example: where a disease clause pairs a radius provision with an express exclusion for occurrences outside it, the exclusion will hold - and the rule on competing causes will work in the insurer's favour, not against it.
