The leaders are debating the issue of North Sea Oil.
Alex Salmond says that "every other country in Europe would give their back teeth to have North Sea Oil".
Alistair Darling argues that it is risky to rely on a source of revenue that is very volatile, saying that Salmond is "gambling our children's future".
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Continuing cloudy and mild with outbreaks of rain, heavy at times over Galloway
Cloudy with outbreaks of rain, heaviest in west
Emma Jesson brings you Sunday night's forecast