Switzerland set to depreciate their currency to reduce the economic slowdown

The Financial Times reports today that the Swiss Central Bank has started to intervene in the currency markets to lower the value of the Swiss Franc because they fear that a rapidly appreciating currency will worsen their economic slowdown

http://www.tutor2u.net/blog/index.php/economics/comments/currency-wars/#extended

Essay bank on Exchange rates

http://www.tutor2u.net/blog/images/uploads/OCR_2887_Essay_Bank_ER.pdf

Video - current account deficits and exchange rates

http://www.youtube.com/watch?v=yCjwXz7ZXwU&feature=channel_page

Marshall-Lerner condition

This looks at the effect on the Balance of Payments when the £ depreciates (in the short and longer term).
http://s-cool.co.uk/alevel/economics/exchange-rates/the-exchange-rate-and-the-balance-of-payments.html