Background on the UK and the European Union

Thanks to tutor2u for this
http://www.tutor2u.net/economics/reference/background-on-the-uk-and-the-european-union?utm_medium=email&utm_campaign=Daily+tutor2u+Economics+updates&utm_content=Daily+tutor2u+Economics+updates+CID_059c3cb9b1b6e5bc00252bb27f6cfd10&utm_source=CampMonitor&utm_term=Reference++Background+on+the+UK+and+the+European+Union
and this essay plan on a common tariff could be useful http://www.tutor2u.net/economics/reference/common-external-tariff-analysis-and-evaluation?utm_medium=email&utm_campaign=Daily+tutor2u+Economics+updates&utm_content=Daily+tutor2u+Economics+updates+CID_059c3cb9b1b6e5bc00252bb27f6cfd10&utm_source=CampMonitor&utm_term=Reference++Common+External+Tariff+-+Analysis+and+Evaluation