The Drug Alert Service list has been functioning on firstname.lastname@example.org without issue so a D.A.S. List for the United Kingdom has been added on email@example.com i.e. the emergency services phone number, so it’s easy to remember.
Don’t forget the address inclusions need to be in a standard format like Google Maps, USM, UK Post Office, Apple Maps, Bing Maps, Mapquest, Yandex, etc. Contact support if you want to check on a particular format.