The European Union is an economic and political structure with 28 member states, including Britain. It has a long history stretching back to 1957. Since then it has become gradually more integrated. The EU operates through a number of institutions which work with member countries and with each other.
This year there will be a referendum in Britain on remaining in the EU or leaving. There are many arguments from Eurosceptics who would like Britain to vote to leave, and other arguments from the EU’s supporters, who would like Britain to remain in. British political parties have different positions on the referendum question.