The way we elect our MPs is a system called First Past The Post. Under First Past The Post, a single winner in each individual constituency gets to represent that constituency in Westminster. When Parliament is formed, this means lots of small victories in constituencies can mean big results for one party, and the overall makeup of parliament does not reflect the way the country as a whole voted. For more information about why this is bad, you can read my Note on Democracy on my blog.
This webpage attempts to simulate how the results of the 2019 elections might have looked if we used different systems of proportional representation, whilst retaining a geographic link between an MP and an area. There are, of course, caveats. We can assume some people may vote differently if the system was different, there may be less tactical voting, for example. The boundaries I've crudely drawn are simply the same as existing constituencies added together, but in the real world, a lot more care and attention would go into the boundaries. I've also invented some new names, and I didn't put too much thought into it, so please don't complain too much if the name doesn't make sense.