"According to latest data from the Association of British Insurers (ABI), in 2016 £370m, equivalent to over £1m every day, was paid out by travel insurers to help 480,000 travellers and their families who needed help abroad. While the EHIC is a good thing to have, it should only be used in combination with travel insurance. Being prepared with both sets of coverage will ensure you and your family are completely covered if the unexpected happens."
The european health card only partly covers medical costs. Repatriation under medical supervision is not covered.