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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The family of Christian Pay, who died on Friday after suspected substance abuse at a festival, have paid tribute to the Millom teenager.
The Borders Railway is to be officially opened by the Queen... on the day she becomes Britain's longest serving monarch.
Christian Pay's family say he was "loved by all" and had "the heart of a lion". The 18-year-old died after falling ill at the festival.