The UK’s first-past-the-post system means that the number of votes rarely translates into an equivalent proportion of seats. And that was especially true in this election. The SNP won 56 seats from 1.45 million votes, a share of 4.8%. But by mid-morning on Friday UKIP had won only one seat for their 3.87 million votes, a 12.7% share of the total. The Greens’ 1.15 million votes translated into one seat too, while the Lib Dems won eight seats despite winning nearly 2.4 million votes, a 7.8% share.