We have a whole of life policy which we always knew paid out on the second death. It does also have a cash value but we don't need that and it will pay out , without affecting the inheritance tax liability, which in any case doesn't affect us now that a couple are covered. It will certainly pay out more than we will have paid in as it is index linked.
I didn`t know that there was such a thing, until my friend`s widower told me that he`d rung his wife`s insurers, hoping that her life insurance would cover the cost of a headstone, to be told that as it is a joint policy, they won`t pay out until he himself has died.