A friend of mine once needed urgent assistance while on vacation, and now I always check the policy terms, with https://www.globelink.eu/seniors-travel-insurance.html containing information about insurance for senior travelers from the UK and European countries. It's best to keep the policy number and assistance details separate from your main luggage. I also keep an electronic copy of the policy so I can access it from any device. Do you save the 24-hour helpline number before your flight?