Lithium-ion batteries hidden in household waste are igniting fires at UK recycling centres at a rate exceeding ten per week. The Environment Services Association reported 1,518 fires in the year to March 2026, with at least 541 directly attributed to lithium batteries and another 216 occurring in bin lorries. The trade body believes these figures undercount the problem — it estimates 70% of recycling-centre fires are battery-caused, though only 40% can be forensically confirmed. The annual cost has climbed from £150m in 2021 to £1bn today, a nearly sevenfold increase in five years. That figure covers facility damage, firefighting resources, insurance premiums, and lost processing capacity. The Ilford fire alone required 25 firefighters. London Fire Brigade has warned that these blazes are resource-intensive, time-consuming, and environmentally damaging to surrounding communities. The mechanism is straightforward physics. Dr Francesco Restuccia of King's College London explains that when a lithium battery's separator is pierced — routine during the crushing and sorting that recycling centres perform — internal short circuits drive temperatures to ignition point. An HSE experiment commissioned by the ESA showed a punctured vape battery reaching over 750°C, burning like a sparkler and igniting surrounding paper and cardboard for two minutes. Vapes are the accelerant. They are cheap, ubiquitous, and designed for disposal after brief use — a combination that guarantees high volumes entering the general waste stream. Biffa, one of the UK's largest waste management companies, recovered 500,000 vapes from its facilities in summer 2026 alone. Each one is a small incendiary device waiting for mechanical compression. The ESA is calling for a mandatory £5 deposit on all vapes sold in the UK, designed to create a financial incentive for consumers to return devices to retailers rather than tossing them in household bins. Patrick Brighty, the ESA's head of recycling policy, describes the situation as reaching "epidemic proportions" and warns that a single hidden battery can decimate an entire facility. Recent fires span the country: Deptford in south-east London, Ilford in east London, Caerwent in Monmouthshire, Widnes in Cheshire, Glasgow, Costessey near Norwich, and Dereham in Norfolk. The geographic spread confirms this is a systemic national problem, not a localised failure. Every waste facility in Britain processes the same mix of improperly discarded batteries. The structural issue is a product-design and regulatory gap. Manufacturers sell billions of lithium-battery-containing products with no responsibility for end-of-life handling. The waste system absorbs the combustion risk, the firefighting cost, and the insurance burden. Until the cost of safe disposal is embedded in the purchase price — via deposit schemes, extended producer responsibility, or outright bans on non-rechargeable lithium devices — the £1bn annual bill will keep climbing.