This was something a lot of people were afraid of:
https://www.bbc.com/news/entertainment-arts-55483105
Well, the article says it's the EU fault / decision, but nevertheless we should keep in mind that you can't leave the EU and at the same time benefit from all of its advantages. So this is one of the examples for what it means to be outside the Union.
I don't think it will affect bigger bands, but could be threatening to smaller bands.