[Silhouette]

It was actually 37% of those who voted. Only two thirds of the electorate did, so in fact fewer than 1 in 4 of the electorate actually voted for the party that now has an absolute majority in the House of Commons.

That actually wasn't the biggest quantitative statistical unfairness of the night -- that award surely goes to the dramatic under-representation of UKIP and the Lib Dems in MPs compared to the popular vote they attracted -- but given the implications of an outright majority in Parliament, the disproportionate Tory representation is probably the most practically significant of the statistical anomalies that night.

[ionised]

> that award surely goes to the dramatic under-representation of UKIP and the Lib Dems in MPs compared to the popular vote they attracted

I think you could lump the Greens in with them too.

[Silhouette]

Yes, that's fair, the Greens also suffered from the same electoral math bias that night.