In reply to Deek:
I've read a few examples of this, with most agreeing with the Consumer Association that £100,000 will buy a £5,200 to £7,000 per annim anuity depending on whether it is index linked, a percentage to go to spouse on death or if you are a smoker. Smoking or ill health will increase the payout (shorter life expectancy). Bolted climbing could have an adverse effect (longer life expectancy).