John GreenRussian President Vladimir Putin announced on 12 May 2026 that the RS-28 Sarmat intercontinental ballistic missile had completed a successful test launch from the Plesetsk Cosmodrome and that the first operational regiment would enter combat duty by the end of the year, deployed with the Uzhur missile division in Krasnoyarsk Krai. The liquid-fuelled, silo-based ICBM — designed to replace the Cold-War-era R-36M2 known to NATO as "Satan" — can carry multiple independently-targetable warheads and, according to Russian claims, has an operational range exceeding 18,000 kilometres. Western analysts at Reuters and CNN have broadly confirmed the test, while disputing the more theatrical of Moscow's range claims.
For UK households watching the news, the question is not whether the missile works — it does — but a much smaller and more practical one: if the worst ever happened, what would your home insurance actually pay out? The answer surprises most policyholders.
The standard UK exclusion clause
Almost every household, motor, and life-insurance policy sold in the UK contains a clause that excludes loss or damage arising from:
war, invasion, acts of foreign enemies, hostilities (whether war is declared or not), civil war, rebellion, revolution, insurrection, or military or usurped power.
Most policies also contain a separate nuclear-and-radiation exclusion that removes cover for "ionising radiation or contamination by radioactivity from any nuclear fuel or from any nuclear waste from the combustion of nuclear fuel" and for "the radioactive, toxic, explosive or other hazardous properties of any explosive nuclear assembly or nuclear component thereof."
These two clauses, sometimes combined into a single "war and nuclear risks exclusion," appear in standard wordings published by the Association of British Insurers (ABI) and adopted by every major UK personal-lines insurer. They are non-negotiable on consumer policies.
What this means in practice
The clauses do three things that often surprise homeowners:
1. They strip out cover even when the damage is indirect. A house damaged by debris from an intercepted warhead, or made uninhabitable by radioactive contamination from a distant blast, is uninsured even though the immediate cause looks like an ordinary fire or impact claim.
2. They apply regardless of whether war is formally declared. The ABI wording captures "hostilities... whether war is declared or not," which means a single missile event would qualify even before Parliament had voted on a declaration.
3. They override every other clause in the policy. Cover for "all risks" or "comprehensive" is subject to the exclusions. A platinum-tier home-and-contents policy provides no more nuclear-event protection than the cheapest essentials package.
Why insurers exclude these risks
The answer is structural, not commercial. Catastrophic war and nuclear risks are uninsurable in the actuarial sense — the loss is correlated across every policyholder in the affected region, so the insurer cannot pool the risk against unaffected customers. A nuclear strike on a major UK city would destroy not only the insured properties but a significant fraction of the insurer's own capital and reinsurance recoveries.
Lloyd's of London, Munich Re, and the global reinsurance market all impose the same exclusion at the wholesale level, which is why no retail insurer can offer the cover even if it wanted to. The Prudential Regulation Authority, part of the Bank of England, requires UK insurers to demonstrate solvency under a range of stress scenarios — and a nuclear event would put any commercial insurer immediately out of business if cover were not excluded.
What is covered
Two narrow categories of nuclear-related loss can be insured in the UK:
- Civil nuclear-industry liability under the Nuclear Installations Act 1965, which channels liability to the licensee of any UK nuclear site and is backstopped by the state. This protects neighbours of a Sellafield-type incident, not households facing an external attack.
- Terrorism cover through Pool Re, the government-backed terrorism reinsurer, which can include some chemical, biological, radiological, and nuclear (CBRN) damage — but only where the cause is classed as terrorism, not state-on-state warfare.
Pool Re cover is available for commercial property; the residential equivalent is provided through standard home insurance only for terrorism-related fire and explosion damage in Northern Ireland and (since 2002) for the rest of the UK. A nuclear-armed missile launched by a foreign state would fall outside the terrorism definition.
What the UK government already plans for
The official government planning assumption for a nuclear or radiological emergency sits in the National Risk Register, published by the Cabinet Office and updated annually. The 2025 edition (released January 2025) sets out the central scenarios and the responsibilities of central government, local resilience forums, and the emergency services.
Crucially for households, the Register confirms that compensation in the event of an attack would be handled through a special governmental scheme rather than the commercial insurance market. The legal basis is the Civil Contingencies Act 2004, which gives ministers wide emergency powers including the ability to direct the payment of public funds.
In other words: the safety net exists, but it is a state safety net, not a private one. The size and timing of any payment would be determined by Parliament after the event.
What a solicitor or financial adviser will check for you
A specialist insurance solicitor or independent financial adviser can audit your existing cover for three things:
- The exact wording of the war and nuclear exclusions in your home, contents, motor, life, and critical-illness policies — wordings vary, and a few specialist policies have narrower exclusions than the ABI standard.
- Your exposure to overseas-property risk. If you own property in mainland Europe, particularly in countries closer to Russia or Belarus, the policy wording is governed by local law and the exclusions may bite differently.
- Whether your pension and investment portfolio is appropriately diversified away from concentrated UK and European risk exposure — a financial-planning question rather than an insurance one.
For most UK households the practical conclusion is the same: there is no commercial product that meaningfully insures against nuclear war, the state is the residual payer, and the most sensible step is to know which lower-tail risks (fire, flood, theft, accidental damage) you are insured for and which you are not.
The bigger picture
Russia's announcement of Sarmat deployment by late 2026 will not change UK consumer-insurance economics. The war-and-nuclear exclusion has been in standard policies since the 1950s and is unlikely to move. What changes is the public's awareness of it.
The most useful thing a UK homeowner can do this week is not buy new insurance. It is to read the schedule of exclusions in the policy already on the kitchen drawer — and to make sure that the cover that does apply, for fire, flood, theft, and accidental damage, is at the right sum insured for 2026. A specialist solicitor or independent financial adviser can spot gaps in an afternoon that policyholders miss for years.
