The chart that shows why Labour and the Tories don't want to reform the voting system

People who vote for smaller parties get a very rough deal indeed

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Indy Politics

Five party leaders from Ukip, the Lib Dems, Greens, SNP and Plaid Cymru have handed in a petition with half a million signatories to Downing Street.

The party leaders, who put aside their differences from across the political spectrum, say Britain's voting system is unfair.

They may have a point: votes cast in the election seem to have very little bearing on its result.

The Conservatives gained 36.9% of the vote and get to run the whole country - similar strange results happened under Tony Blair, too.

Ukip, which scored a breakthrough 12.6% of the vote, only won a single seat - 0.15% of the 650 seats in parliament, to be precise.

The Green Party won well over a million votes and got one seat.

As long as the voting system stays unchanged, Labour or the Tories will likely be able to keep their opponents at bay.