You may find the following useful
This is the main place where you can get information that will help you think about Lasting Power of Attorney, Mental Capacity Act, Data Protection, What to do when somebody dies, Death Grants, Probate and much else besides. This is the generic site where you can search for your specific query.
Enter your details and get a statistical estimate of your likely lifespan.
BEWARE! Put your weight in as pounds not kilos
This does not mean that you will each this age, or that you will retain strength and faculties.