If you have a European Health Insurance Card and it is coming up for renewal (or you are applying for the first time), please make sure you apply on the official NHS website (www.nhs.uk/ehic). There are several websites which charge you for this service, but it is completely free on the NHS website. Don't get caught out by these websites who charge you and please tell your friends. You can read more about this on the following links:
contactcentreservices.nhsbsa.nhs.uk/selfnhsukokb/AskUs_EHIC/template.do?name=Why+was+I+charged+for+a+European+Health+Insurance+Card+%28EHIC%29%3F&id=16484