I’ve sometimes pondered what would happen to me if I was out on my own, was in some kind of an accident and the ambulance staff didn’t know who to contact, so I’ve always kept obvious things like “Home” and “Mum” in my mobile’s phone book even though I know their numbers. I’ve just heard about the “In Case of Emergency” (ICE) campaign, where you prefix a number in your phone book with ICE, so the ambulance staff can find it quickly and know who to contact to seek consent for emergency treatment. According to Vodafone, “75% of people carry no details of who they would like telephoned following a serious accident”. More details from East Anglian Ambulance Service and Vodafone.