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An illustrative picture taken in London on February 25, 2013 shows an arrangement of British 10 and 20 pound bank notes. Moody's stripped Britain of its triple-A debt rating after markets closed on February 22, 2013, saying government debt was still mounting and that growth was too weak to reverse the trend before 2016 -- heaping more pressure on the pound. After hitting a fresh low-point on February 22, the pound recovered in trading in London to reach 1.5143 USD on February 25, compared with 1.5162 USD on February 22. AFP PHOTO / BEN STANSALLBEN STANSALL/AFP/Getty Images
An illustrative picture taken in London on February 25, 2013 shows an arrangement of British 10 and 20 pound bank notes. Moody's stripped Britain of its triple-A debt rating after markets closed on February 22, 2013, saying government debt was still mounting and that growth was too weak to reverse the trend before 2016 -- heaping more pressure on the pound. After hitting a fresh low-point on February 22, the pound recovered in trading in London to reach 1.5143 USD on February 25, compared with 1.5162 USD on February 22. AFP PHOTO / BEN STANSALLBEN STANSALL/AFP/Getty Images

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Scottish independence: Euro or pound?

CNN's Richard Quest speaks with Humza Yousaf about why they would remain on the British pound instead of the Euro.

Scottish independence: Euro or pound?

CNN's Richard Quest speaks with Humza Yousaf about why they would remain on the British pound instead of the Euro.