Scotland would need to cut public spending, increase taxes, or both if it was to survive independence.
A new study from the Institute of Fiscal Studies (IFS) said that failing North Sea oil revenues and an ageing population would create tough economic choices for the independent nation.
More top news
Emma Jesson brings you Sunday night's forecast
Frosty on Sunday night with showers on Monday, some wintry. Breezy in the west. Unsettled, changeable, cool new week
Emma Jesson brings you Saturday night's forecast