MP4 are a band made up of 4 MPs, vocalist and guitarist Kevin Brennan (Labour MP for Cardiff West), drummer Sir Greg Knight (Conservative MP for East Yorkshire), keyboard player Pete Wishart (SNP MP for Perth and North Perthshire), and bassist and vocalist Ian Cawsey (former Labour MP for Brigg and Goole).

They started after a conversation about whether or not the skills existed in the commons to form a rock band, and so the four men banded together to form MP4. Bonded by a want to promote live music and other arts-related issues, as well as the importance of voting, they set off on their musical venture. They mainly play charity gigs, raising over £1 million since forming; but the band also play on Matt Forde's TV show, Unspun, as the house band every week. 

The band found that the music industry were intrerested in them as they were cross-party, showing that there's more to discussions between political parties than just shouting in the commons. This is a more powerful message than most, especially with politics becoming increasingly tribal. 

Their band only emphasises the link between music and politics, with Kevin Brennan stating that there is always a link between the two, made stronger more recently with Corbyn's campaign in 2017 working with musicians from all genres.

This also has an impact on votes, which is another area the band aim to influcence - but not in the way you might think. MP4 are more concerned with increasing voter turnout, than campaigning for any specific political  party. Sir Knight said, "We have found that music enables you to communicate with many people who perhaps cannot be reached by a political speech. The band encourages all young people to take an interest in politics but, as we have different opinions ourselves, we would not seek to tell them how to vote."

On the link between music and politics right now, Kevin Brennan said, "I think what has happened is that within the entire creative sector, the whole brexit referendum has woken lot of people up to the importance of politics. You would find a few years ago, people saying all "if voting changed anything they'd have abolished it years ago", but actually, voting makes a very big difference.

"The fact that after 2010 we've had the coalition government, which led to the Tory government, which lead to a referendum, which lead to a Brexit vote - that's because of voting and people not turning out to vote, or voting of a certain way, or young people being dictated by the older generations because they turn out in greater numbers. I think in the music industry, that has woken a lot of people up to see that actually politics is really important, and so they need to get a bit more engaged."