Add info text to EVL

https://www.pivotaltracker.com/story/show/55470212
and
https://www.pivotaltracker.com/story/show/55071294

text from https://docs.google.com/a/digital.cabinet-office.gov.uk/document/d/1BxS-P-p1o6gDj42GSQMd3jvsudWxDRAAvzk7sDIUNLg/edit#