Everybody is issued a Blue Cross card, or a third party insurer card, so that no matter where they are—even if they're on holiday in Thailand—they'll have all their health care paid for. For regular force members, full-time members of the armed forces, the armed forces aren't only responsible for injuries and illnesses related to military service, but any injury or illness for any reason.
On April 8th, 2014. See this statement in context.