The video will start in 8 Cancel

Want to keep up to date on Welsh politics? Sign up and get political news sent straight to your inbox Thank you for subscribing We have more newsletters Show me See our privacy notice Invalid Email

The make up of the House of Commons would be very different if parties were allocated seats based on the number of votes they won across the UK.

Under the current system "first-past-the-post", a party can win a huge amount of the vote share but not win any seats because only the party in first in each constituency gets a seat.

Critics say this system can lead to "safe seats" that can never change hands and encourages people to vote tactically instead of who they would actually want to govern them.

In the election the amount of votes per seat won varied wildly. For instance the Scottish National Party had a seat for every 26,000 votes they received. By contrast The Greens had 857,513 votes and only won one seat.

Labour needed to win more than 50,000 votes to win a seat while the Conservatives only needed to win 38,000 votes to send a Tory to Parliament.

We worked out how our election would have looked if our MPs were selected proportially.

This chart shows the difference in the House of Commons if there was a proportional system:

The headlines this morning would be very different if we had proportional representation:

No overall majority for any party

The Conservatives win 75 seats fewer

The Greens go from one seat to 17

The amount of SNP seats halves

A government could only be formed if parties worked together

The Brexit Party win 13 seats

You can see our data here: