EHIC, a trick in the tail.
As we know after Dec 31st. for British tourists the EHIC becomes defunct and as worthless as an expired credit card however I read a little snippet today which said that anyone actually abroad in the EU on that date will still be able to use it for the remainder of their trip giving them the benefit of a maximum of an additional 90 days which is of course the longest they will be able to stay after that.