- The Foreign, Commonwealth and Development Office states that failing to declare an existing condition or pending treatment may invalidate travel insurance.
- Travelling to a destination where the FCDO advises against all but essential travel, or against all travel, may also invalidate a policy.
- A UK Global Health Insurance Card does not cover medical repatriation, private treatment, or ski or mountain rescue, and is not a replacement for travel insurance.
- Association of British Insurers members paid 472 million pounds across more than 500,000 travel claims in 2024, but cover applies only where a policy's terms are met.
Travel insurance is sold on what it pays out, yet declined claims usually turn on what a policy quietly leaves out. The Foreign, Commonwealth and Development Office (FCDO) sets out several situations in which a UK policy may not respond at all, and providers publish their own general exclusions alongside them. This explainer groups the most common exclusion categories and the documented reasons claims are refused, drawing on FCDO guidance, NHS information on the Global Health Insurance Card, and Association of British Insurers (ABI) claims data.
Undeclared pre-existing medical conditions
The single exclusion the FCDO emphasises most is non-disclosure of health history. Its guidance states travellers should "declare existing conditions or pending treatment or tests so that you are covered if there are related complications during your trip; failing to declare something may invalidate your travel insurance."
This is not limited to serious diagnoses. Pending tests, medication changes and conditions a traveller considers minor can all fall within a medical declaration. Where an undeclared condition contributes to a claim, an insurer may decline it or void the policy. The ABI echoes the point in its consumer guidance, noting that failing to disclose conditions "could invalidate your policy or cause issues should you need to make a claim." Declaring a condition does not always raise the premium, but it is what keeps related treatment within scope of cover.
Travel against FCDO advice
A policy can be active and premiums paid, yet still fail to respond because of the destination. The FCDO states plainly: "If you travel to a destination where FCDO advises against all but essential travel or all travel, your insurance may be invalidated."
FCDO advice changes with conditions on the ground, so a destination considered safe when a trip is booked can move into an advisory zone before departure. Providers reflect this directly. One verified UK provider lists among its general exclusions "travelling against advice of the Foreign, Commonwealth and Development Office," stating that "policies won't cover destinations where the UK government advises against all travel." Checking the live FCDO foreign travel advice page for each destination before and during a trip is the documented way to confirm cover remains valid.
Activities that need an add-on or specialist cover
Standard policies cover a baseline of holiday activity, but not everything a traveller might do. The FCDO advises that cover should extend to "all activities you may undertake on holiday, such as sports or adventure tourism," while warning that "you may need specialist insurance or an add-on for some activities."
Winter sports, scuba diving, mountain trekking, motorcycling and similar pursuits are commonly outside the default schedule. A provider's general exclusions may include "activities not listed on your policy, like extreme sports or cruises, unless you've added them." The practical exposure is that an injury during an unlisted activity may not be covered for medical costs, repatriation or related cancellation. The activity schedule in the policy wording, rather than an assumption about what a holiday includes, is what defines cover.
Cruises without the right tier
Cruises sit in their own category because medical access at sea is constrained. The FCDO notes that "cruises generally require an additional level of cover because it is more difficult to get to hospital for treatment."
Without cruise cover, a policy may exclude onboard medical treatment, cabin confinement, missed port departures and emergency evacuation from a vessel. Cruise cover is frequently sold as a separate add-on rather than included by default, which means a standard policy bought for an ordinary holiday may not extend to a cruise leg of the same trip.
What a GHIC does not replace
The UK Global Health Insurance Card (GHIC) is sometimes treated as a substitute for insurance, but its scope is narrow. The NHS states it covers "state healthcare that cannot reasonably wait until you come back to the UK" and is valid across the European Economic Area and a short list of other countries.
It does not cover "being flown back to the UK (medical repatriation)," "treatment in a private medical facility," or "ski or mountain rescue." The NHS is explicit that "a UK GHIC is not a replacement for travel insurance." Repatriation costs are precisely where bills escalate: the ABI reports that one member paid out more than 1 million pounds for a customer admitted to hospital in the USA who required repatriation. A GHIC also offers nothing outside its geographic scope, so it provides no medical cover for travel to most of the world.
Alcohol, drugs and recklessness
Behaviour-based exclusions are standard across the market. The ABI states that "an injury that occurs as a result of excessive alcohol consumption is unlikely to be covered." Provider wording can be firmer, with one listing "incidents involving alcohol or drugs" and noting that "claims related to excessive alcohol or controlled substances won't be accepted."
These clauses commonly extend to injuries sustained while intoxicated, claims following the use of controlled substances, and losses arising from deliberately reckless acts. Because these are often the circumstances in which accidents and thefts happen abroad, they account for a meaningful share of refused claims.
Other routinely excluded losses
Several further exclusions appear consistently in published policy wording. Unattended valuables are a frequent one: belongings left unsupervised may not be covered for theft or loss. Cancellation generally applies only for specified insured reasons, so a change of mind is not covered. Missed departures may be excluded unless caused by a defined event such as strike action, severe weather or mechanical breakdown.
Trips taken for medical treatment, or against medical advice to fly, are also commonly excluded, as is travel undertaken for business or work where a leisure policy was purchased. Each of these turns on the specific policy wording rather than a general assumption, which is why the schedule and the general exclusions section repay close reading before a trip.
Why claims get declined: the pattern
Across these categories a single theme recurs. Cover is defined by the policy document and by external rules such as FCDO advice, not by what a traveller expected to be included. The ABI's 2024 figures show insurers paid 472 million pounds across more than 500,000 travel claims, with medical claims alone reaching 262 million pounds at an average of 1,528 pounds. Those payouts went to claims that met their policy terms. Declined claims tend to cluster where a condition was undeclared, a destination carried FCDO advice against travel, an activity sat outside the schedule, or an exclusion such as alcohol applied. Reading the policy wording, declaring conditions accurately and checking FCDO advice are the documented ways to keep a claim inside the boundaries of cover.
Frequently asked questions
Does travel insurance cover an injury if I had been drinking?
Behaviour-based exclusions are standard. The ABI states an injury resulting from excessive alcohol consumption is unlikely to be covered, and provider wording commonly refuses claims related to excessive alcohol or controlled substances. The exact threshold depends on the policy.
Can my policy be invalidated by where I travel?
Yes. The FCDO states that travelling to a destination where it advises against all but essential travel, or against all travel, may invalidate insurance. FCDO advice can change after a trip is booked, so checking the live destination page before and during travel matters.
Is a GHIC enough on its own?
No. The NHS states a UK GHIC is not a replacement for travel insurance. It does not cover medical repatriation, private treatment or ski and mountain rescue, and it only applies within the European Economic Area and a short list of other countries.
What happens if I forget to declare a minor health condition?
The FCDO warns that failing to declare an existing condition or pending treatment may invalidate insurance. Where an undeclared condition relates to a claim, an insurer may decline it. Declaring a condition does not always increase the premium but keeps related treatment in scope.
Are winter sports and cruises covered as standard?
Usually not. The FCDO notes some activities need specialist insurance or an add-on, and that cruises generally require an additional level of cover. Whether a specific activity is covered depends on the schedule listed in the policy.
