Can't be a straightforward case then, tamborine (but I wouldn't expect anything else for you- you seem to like a challenge). Pension plans I have seen have been clear on the options.
Have you read the policy/plan details Panic Button. It will be set out in the terms and conditions.
If you have it just in your name it will stop paying out when you die (after all, it's not much use to you after that). That will fund the pensions of those who live until they are 100.
It will be clearly laid out in the terms of the policy but typical clauses may include:
A lump sum paid to whoever you named as the beneficiary, if you die before retirement starts
a spouses pension (again paid to whoever you named as the beneficiary) in the event of death after retirement. Often paid for the remaining life of the spouse (but at a lower rate - say 50% of the pension-holder's pension). Or a clause that pays it only for a fixed length of time afterwards.