A wave of hoax bomb threats has knocked flights off course across Europe, and the UK's aviation regulator has delivered a blunt verdict on the money question: don't expect a payout.

The Civil Aviation Authority says bomb hoaxes will almost certainly be treated as an "extraordinary circumstance" — a legal category covering disruption that isn't the airline's fault, such as security risks. Under UK261-style compensation rules, that means affected passengers are unlikely to qualify for the fixed cash payouts they'd receive after many other delays and cancellations.

The scale of this week's disruption has been unusually broad. Heathrow and Birmingham airports both received threats, while UK departures to European cities — including services from London Stansted, Newcastle and Glasgow — were caught up in the wave. Several aircraft were diverted mid-flight, and some were forced into emergency landings. The government believes the threats were malicious hoaxes, and the timing has raised wider alarm about information warfare, coming in the same week as cyber attacks on supermarket refrigeration systems and blood banks in Europe. IATA has called on authorities to trace those responsible, while reassuring passengers that security measures remain robust.

The consolation for stranded travellers is that "extraordinary" doesn't mean "nothing owed". Rory Boland, editor of Which? Travel, points out that airlines still carry a duty of care regardless of who caused the problem. In practice that means food and drink proportionate to your wait, and a hotel room if you're stuck overnight. You also retain the choice between a refund and rerouting at the earliest opportunity.

The catch is timing. If a destination airport temporarily closes while police assess a threat, delays can stretch well beyond what a reroute on another flight would normally involve — so anyone caught up in a diversion should be prepared for a long wait at arrivals, a mystery hotel, or both.

For holidaymakers, the practical takeaway is straightforward: keep every receipt if a threat strands you, because meals, transport and accommodation costs should be covered by your airline even when compensation isn't. Travel insurance may also pick up costs tied to security-related disruption, though policies vary, so check the small print before relying on it. And if an airline refuses to provide care during a lengthy delay, that refusal is worth escalating — the absence of a compensation payout doesn't remove the airline's obligations.