Chancellor George Osborne's expected to rule out the possibility of an independent Scotland keeping the pound when he makes a speech in Edinburgh later.
Nationalists say the UK government is bluffing and that a currency union is the best option.
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Showers or longer spells of rain. Gales on Sunday
One of the world's most famous locomotives drew huge crowds in Cumbria today, as it arrived after a ten year, £4.2 million, restoration.
One hundred artworks have been donated to an auction, to raise money for victims of flooding in Cumbria.