UK travellers warned: common error can void insurance

UK holidaymakers are being urged to double check their travel insurance paperwork after regulators, ombudsman data and consumer guidance highlighted that a single mistake on a policy application can be enough to invalidate cover and leave travellers facing bills running into thousands of pounds.

Regulators highlight rising disputes over voided policies

Recent figures from the Financial Ombudsman Service show that 3,200 travel insurance complaints were received between 1 April and 31 December 2025, with many disputes centring on whether cover could be declined because of incorrect or incomplete information given when the policy was bought. Publicly available case studies indicate that disagreements often arise after claims for medical treatment, cancellation or trip disruption are turned down on the grounds that the policy was void or did not respond in the way the traveller expected.

Guidance from the UK government on foreign travel insurance warns that failing to disclose relevant facts, particularly health-related information, can mean an insurer is entitled to refuse a claim or treat the policy as if it never existed. Consumer material from the Financial Conduct Authority shows that firms are expected to explain medical exclusions clearly, but it also confirms that cover is based on the information supplied by the customer, placing responsibility on travellers to answer questions accurately.

Industry data and advice from travel organisations further underline that medical bills abroad can quickly exceed the typical cover limits offered by basic policies. For UK residents, the government-backed Travel Aware campaign stresses that travel insurance should sit alongside, not instead of, arrangements such as a UK Global Health Insurance Card, and that a voided policy can remove the protection many travellers assume they have for emergency repatriation and private medical costs.

Non-disclosure of medical conditions remains the biggest risk

According to guidance from ABTA, one of the most frequent reasons for travel insurance to be cancelled or claims to be rejected is a failure to declare pre-existing medical conditions in full. The association’s advice for travellers states that omitting information about ongoing illnesses, recent surgery, repeat prescriptions or investigations can result in a policy being treated as invalid or a claim being only partly settled, even if the undeclared condition appears unrelated to the eventual problem.

Detailed medical screening pages on ABTA-branded insurance sites note that travellers often overlook conditions they consider minor, such as controlled high blood pressure, raised cholesterol, asthma or managed diabetes, or forget about older diagnoses and tests. However, insurers commonly define pre-existing conditions broadly, covering any illness, injury or psychological condition for which a person has received treatment or taken prescribed medication over a specified look-back period, often stretching to at least one or two years.

Travel health guidance from TravelHealthPro, provided by the National Travel Health Network and Centre, also emphasises that even where a doctor considers someone fit to travel, the individual must still disclose all past and current conditions and medication when arranging cover. The advice explains that insurers use this information to assess risk and set premiums, and that incomplete disclosure may be treated as a breach of the duty to take reasonable care when answering application questions.

Policy wordings from specialist medical travel insurers typically contain explicit clauses stating that any claim arising directly or indirectly from an undeclared condition, or from a change in health that was not reported before departure, may not be paid. Some providers specify that this applies both to the policyholder and to close relatives or travelling companions whose health the trip depends on, which can affect cancellation cover if, for example, a relative’s undisclosed condition worsens before departure.

Simple application mistakes that can wipe out cover

Beyond medical history, official advice and industry documentation show that apparently small errors on an application can have major consequences. The UK government’s foreign travel insurance guidance lists inaccurate trip dates, incorrect destination details and understated trip value as common issues that can undermine later claims for cancellation or curtailment. If a traveller gives an earlier end date than the actual return flight, for instance, any incident on the final days abroad may fall outside the insured period.

Travel Aware material also warns that taking part in activities outside the scope of the declared holiday can leave travellers exposed. Examples used in insurer brochures include hiring a motorbike or moped abroad without holding the correct UK licence category, or joining adventure sports such as scuba diving or off-piste skiing that are not included in the chosen level of cover. In these situations, the insurer may decline to pay for related injuries on the basis that policy conditions have not been met.

Another area highlighted in consumer guidance is the assumption that other financial products provide equivalent protection. ABTA’s advice notes that while some credit cards include limited travel cover, these products often have strict exclusions and lower limits, and may not respond to medical emergencies or complex cancellations. Similarly, home insurance policies that insure possessions outside the home will not normally cover overseas medical expenses or the cost of being flown back to the UK.

Regulatory documents from the Financial Conduct Authority also encourage insurers to make renewal documentation clear where medical exclusions change from year to year. However, travellers who automatically renew annual multi-trip policies without checking whether new conditions need to be declared risk discovering at the point of claim that important elements of cover have been removed because updated information was never provided.

Ombudsman cases show impact on real holiday budgets

Recent commentary from the Financial Ombudsman Service describes cases in which UK travellers have been left out of pocket after discovering that their policies were voided or did not cover the circumstances of their claim. Public case summaries refer to situations where cancellation claims were rejected because a traveller was not fit to travel at the time of booking and had not informed the insurer about diagnosis or tests, as well as disputes where treatment abroad was linked to an undeclared condition.

The ombudsman highlights that travel insurance is heavily regulated and that insurers must treat customers fairly, including explaining what they need to disclose and assessing claims in line with the wording of the contract. At the same time, the service notes that policies rely on accurate answers to application questions, and that where information has been withheld or mis-stated, the insurer may be entitled under insurance law to reduce or decline a payout.

Financial guidance platforms referenced by consumer commentators, including MoneyHelper and official signposting initiatives created by the Financial Conduct Authority, have sought to improve understanding of these issues for people with medical conditions. The signposting rules aim to direct customers who struggle to find affordable cover towards specialist providers, reducing the temptation to omit information in order to obtain a cheaper premium.

Travel organisations and health bodies continue to advise that purchasing comprehensive cover as soon as a trip is booked, reading the medical declaration carefully, and contacting the insurer to update any change in circumstances before departure are key steps to avoid being caught out. Where travellers are unsure whether something counts as a pre-existing condition or a material fact, official guidance from ABTA and government-backed campaigns recommends erring on the side of disclosure and keeping written confirmation from the insurer of any agreed changes.

What UK holidaymakers should check before they travel

Current consumer advice suggests that UK residents planning trips in late 2026 and into 2027 should start by checking that their policy covers their destination, including any planned stopovers or cruise segments, and that the trip length matches the time they will be outside the UK. Annual multi-trip products often have a maximum duration per journey, and exceeding this can invalidate cover for the whole trip if an extension has not been agreed in advance.

ABTA’s latest travel checklist recommends arranging insurance as soon as flights or accommodation are booked so that cancellation protection starts immediately, and ensuring that any existing medical conditions or new diagnoses between booking and departure are reported. The checklist also reminds travellers to consider how much they have prepaid for flights, packages and excursions when selecting cancellation limits, as underinsuring the total trip cost can leave gaps if plans are disrupted.

Government guidance further encourages travellers to confirm what documents they would need in an emergency, such as contact numbers for the insurer’s 24-hour assistance line and evidence of policy purchase. Having these details easily accessible can speed up medical authorisations or alternative travel arrangements and may reduce the risk of disputes later, particularly where delays, industrial action or infrastructure problems lead to knock-on costs.

With overseas travel from the UK continuing to rebound and regulators monitoring complaint levels closely, the emerging message from official information and industry bodies is consistent. A single overlooked detail on a travel insurance proposal form, whether a forgotten prescription, an incorrect date or an activity that is never mentioned, can be enough to void the policy when it is needed most, leaving holidaymakers to fund unexpected bills themselves.