What kind of a mandate do you need to be elected as an MP?

Bar chart showing percentage of eligible voters who voted for winning candidates in NI's 18 constituencies, together with the percentage turnout

Not as big as you’d think! On average, you only need to persuade one in four voters in your NI constituency to support you. In some areas, less than one in five voters would be enough. Most of the figures you see at election time talk about the percentage share of the vote, ie those who turned up at a polling station (or posted in their vote). But what about the percentage share of the eligible voters? What kind of …

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