Between 6 and 9 June, some 350 million people across 27 European Union member states will come together to elect 720 members of the European Parliament. While the parliament to be elected will represent everybody in the bloc, each country votes slightly differently – and that’s particularly apparent this year. While each nation uses the system of proportional representation – which means that a party’s share of the vote is reflected in its seat tally – each individual country uses its own variant. Nineteen countries use the preferential voting system, where voters are able to express their pre…