Really good, simple idea...

"The Ambulance Service have launched a national "In case of Emergency (ICE)" campaign with the support of Vodafone.
The idea is to store the word "ICE" in your mobile phone address book, and against it enter the number of the person you would want to be contacted "In Case of Emergency".
In an emergency situation ambulance and hospital staff will then be able to quickly find out who your next of kin are and be able to contact them. It's simple and effective.
For more than one contact name ICE1, ICE2, ICE3 etc"

Article here...might have helped a few days ago...