I got bored and decided to make a sort-of proportional UK election map.
Similar to the German
Zweitsimme in some ways,* the regional constituencies of the UK are a new part of elections introduced for the 2015 election, created at the behest of the Liberal Democrats for their participation in the coalition government and as a counterbalance to the reduction in seats of the boundary review conducted at the behest of the Tories. They are used to elect an additional 115 MPs to the House of Commons, assigned at a rate of roughly 1 member per 500,000 residents, with members basically added by rounding up or down. Also like the
Zweitsimme, votes are cast at the same time as the regular vote for one's House of Commons constituency, with roughly proportional vote-to-seat calculations.
In their inaugural election, it was not the Lib Dems who most benefitted as one might expect, but UKIP, who won 16 of their 17 seats in Parliament through the regional constituencies. However, the Lib Dems did manage to win twice as many seats due to the regional seats, and the Greens won three additional seats to the Brighton seat they held. Despite the Tories winning over 100 FPTP seats more than Labour, they tied with Labour in the regional constituency members, although they still won 370 seats, enough for an overall majority.
*This has nothing to do with anything, but I find it amusing how much Farage would probably hate that he has to switch to a system inspired by Germany to make much leeway in Parliament.