The Balance of Payments (BoP) records economic transactions between residents of a country and the rest of the world. There are two sections: Current Account and the Capital & Financial Account.
http://rapidrevision.co.uk/economics-student/2009/11/07/faq-what-is-balance-of-payments/
What is the current BoP in the UK?
http://rapidrevision.co.uk/economics-student/2009/11/09/faq-what-is-the-current-balance-of-payments-position-for-the-uk/
Causes of a current account deficit
http://rapidrevision.co.uk/economics-student/2009/05/05/the-causes-of-a-current-account-deficit/
Policies to improve the current account position:
http://rapidrevision.co.uk/economics-student/2009/05/06/policies-to-improve-a-current-account-deficit/