But the first-past-the-post voting system for MPs is a huge obstacle for any small party.

ECONOMIST: Why the Green breakthrough may finally have come

But had it not been for the peculiarities of the first-past-the-post voting system, it would have won more.

ECONOMIST: A founding father retires in his own way

If that second election transpires, it looks increasingly likely to be held under the same first-past-the-post voting system that Westminster has always known.

ECONOMIST: Election results