The European Health Insurance Card (EHIC) replaced the old E111 in 2006.

Your EHIC lets you get state healthcare at a reduced cost or sometimes for free. It will cover you for treatment that is needed to allow you to continue your stay until your planned return. It also covers you for treatment of pre-existing medical conditions and for routine maternity care, as long as you’re not going abroad to give birth.

The EHIC is valid in all European Economic Area (EEA) countries, including Switzerland. For more information about what is covered in each country see our country-by-country guide.

You can apply for a free EHIC online.

http://www.nhs.uk/NHSEngland/Healthcareabroad/EHIC/Pages/about-the-ehic.aspx