The biggest issue with British politics at the moment is that it isn't representative of the population at all.
FPTP leads to tactical voting and one or two parties having a vice-like grip on power. The fact that UKIP, Green Party and the Lib Dems literally got millions of votes but weren't able to scrape together more than a few seats in parliament compared to the SNPs 52 seats that they got from 1 million votes is a disgrace and a farce.
In Denmark we have proportional representation, well, most of the system is proportional representation, it's a little more complicated than that but for all intents and purposes - if you get 30% of the vote, you get 30% of the seats in Parliament.
This is great because it means that other parties than the main established parties (like Venstre and Socialdemokraterne) actually have a chance. We have 7 or 8 parties in Parliament at the moment, and the government is currently made up of a tri-party coalition. Governments in Denmark are almost ALWAYS coalitions because you have so many parties getting votes. Which is good because it leads to compromise.
There's literally a valid, legitimate political party for everyone on the spectrum although the Christian party is more or less nonexistent and the Conservative party is dying a slow death although it is currently in the government as a minority partner. Hell, we've even got a party with socialist economic policies but rightist immigration policies called the Danish People's Party.
It sounds confusing but it makes sense and it means we average 85% voter turnout at every election and referendum because people genuinely feel that their vote makes a difference and that they are being represented.
None of this regional, constituency voting bullshit where if you live in one area you're forever doomed to vote Labour even if you want to vote Lib Dem or Greens because they're the only ones who even provide the slightest resistance to the Tories etc.
Electoral reform would create revolutionary changes in British politics.