Travel insurance is designed to pay for certain unexpected costs that may arise when you are travelling, such as flight delays and cancellations and emergency hospital or medical bills.
If you're travelling to a country within the European Union (EU) and you are a UK resident you can apply for a European Health Insurance Card(EHIC). This will entitle you to State provided health care within the EU. This is not a substitute for travel insurance and will only cover you for emergency medical treatment if you become ill or have an accident.