Scotland faces a "pensions time bomb" if it choses to leave the union in September's referendum, according to former prime minister Gordon Brown.
Pensions will be more secure and cheaper to administer if Scotland remains in the UK, the Scottish Labour MP will say in his first speech for the cross-party Better Together campaign.
However, if Scotland leaves the union, the first annual pension bill would be "three times the income from oil", the former Labour party leader is expected to say in his speech.
And it faces a "pensioner time bomb" as the number of elderly people is growing faster than the working age population, an internal Department of Work and Pensions memo procured by Mr Brown said.
More top news
Disneyland visitors got more than they bargained for when Johnny Depp popped up partway through the Pirates of the Caribbean ride.
United Airlines has reached an undisclosed settlement with a passenger who was dragged off one of its flights.
F1's governing body was paid $5 million after it signed a contract with the sport which favours the top teams, ITV News has discovered.