As the Brexit vote draws closer, top U.K. producers have penned an open letter to their fellow creatives, urging them to vote Remain.

There’s no doubt that the Brexit vote (deciding whether the U.K. should stay in the EU or leave) is a personal matter for many Britons.

Some believe that cutting ties with the EU will gain them more personal autonomy (though details of exactly why and how are rather fuzzy), or that the EU is somehow the source of all the U.K.’s problems.

It’s hard to find much basis in fact for these arguments, but as John Oliver outlined on Last Week Tonight, it’s also hard to use reason to combat the passionate surge of dislike for mainland Europe that’s been brewing in the U.K. pretty much since Pangea began to break apart.

Meanwhile, the vast majority of high-profile business owners, NGOs and charities, celebrities, world leaders, and public organizations are backing the Remain campaign. They all have facts and figures explaining why leaving the EU not only wouldn’t gain Britain the fabled autonomy people crave, but would in fact end up costing the poor and disadvantaged segments of the population dearly.

Relevant to our interests, members of the creative industries have been speaking out for or against Brexit; while a few celebrities including Michael Caine and John Cleese are voting Leave, the Remain side counts J.K. Rowling, David Beckham, Benedict Cumberbatch, Keira Knightley, Idris Elba, Elton John, and many more among its ranks.

Related: Brexit: J.K. Rowling, John Oliver among celebrities urging Britain to stay in the EU

And now, top U.K. producers including Barbara Broccoli, Matthew Vaughn and David Heyman are speaking out against Brexit, warning that limiting trade and free movement between Britain and the continent will have severe, negative consequence for the entertainment industry.

In an open letter (via The Hollywood Reporter), the producers warn that without EU funding for regional programming, “many of the regional production funds across the UK would not have the resources they currently have.”

The fact that their products can travel freely across Europe, “significantly increases the earnings of UK audiovisual companies helping them to grow their businesses and to employ far more people,” the open letter states.

Further, Britain’s EU membership also allows British cast and crew to travel freely to other European countries without permits or carnets for their equipment.

“All of these benefits have helped ensure that the U.K. has the fastest growing creative industry sector in Europe,” the open letter concludes. In a secluded, cut-off U.K., the creative industries (like many other industries) would suffer.

Variety further reached out to a number of top British producers, including Harry Potter’s David Heyman, who noted that without foreign talent coming to the U.K., there would be a “hole in the talent pool” that couldn’t be filled from within.

“Not only do [foreign] artists help attract work [to the U.K.] and bring their tremendous talent to the productions, but they also transfer their training and skills to young homegrown animators,” Heyman says.

The Night Manager producer Stephen Garrett adds that, if the U.K. were to leave the EU, British TV content would no longer be a part of the European quota. Thus, if the U.K. media industry gets cut off from Europe, “the most important market for British content outside of the U.S. just disappears at a stroke.”

Finally, Penny Dreadful producer Pippa Harris reaffirms that the standing EU partnerships allow the creative industry to, “move freely around Europe, work with the people you want to work with, and create exceptional television.” As Harris succinctly puts it, “it’s a no-brainer to remain in Europe.”

And entertainment isn’t the only industry that’ll suffer from Brexit. The scientists, too, are calling for Remain. So is the music industry, the tech industry, the retail industry and the service industry. All evidence points to the fact that farming, tourism, and British banks would suffer as well.

tl;dr: There is overwhelming evidence that Brexit would spell disaster for British industries and the economy. Even if you hate Europe so much you’ll do anything to give it this giant metaphorical middle finger, think through the consequences carefully before you make this decision, as a Leave vote could very well end up harming yourself and your own field of employment.