New market analysis showed the best joint-life income for a couple aged 65 and 62, based on a £100,000 purchase price for a level annuity, with a 50 per cent survivor benefit, is £7,015 today.

The entrepreneur, Sam White, hosts Dough - the BBC Radio 4 series which looks at the business behind profitable everyday products and where the smart money might take them next. In each episode, Sam, ...