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People walk past the Royal Bank of Scotland building in London on January 30, 2012. - 

In about a month, Scotland will decide whether it wants to become an independent country, or remain as part of the United Kingdom.

In 2008, the UK government had to step-in and bailout the Edinburgh-based Royal Bank of Scotland. It injected more than £46 billion into the bank, which had so many customers across the UK that it was considered too big to fail.

BBC Scotland's economics correspondent Colletta Smith has been finding out what Scottish independence could mean to one of the country's most lucrative sectors.