- It will be much more expensive and more difficult to do a tour in Europe for British bands and vice versa for European bands who want to enter the UK.
It will stop many bands from coming over and playing in your country, says Sydney Minsky-Sargeant.
Working men's club released their self-titled debut album last year.
Prior to that, they had played in several European countries.
Even then, without the requirement for a work visa and administrative costs, it was difficult to get around.
- It's expensive enough to tour.
When we came to Europe, we mostly did not make any money.
It's like making an investment: You put money into a business and eventually you hope to make a profit.
It's a gamble you take - and now it will not be a gamble, he says.
A lost battle?
Prime Minister Boris Johnson has promised to try to find a solution, but Sydney Minsky-Sargeant believes the battle is lost.
- It is a difficult time to ask for something now that we are going through a pandemic.
The idea of being able to tour, in general, regardless of Brexit, feels unlikely.
I think their [government's laziness in tackling the pandemic will put it all down, he says.
Anger from the music world
Stuart Braithwaite, a member of Scottish Mogwai, tells NME that a visa-free alternative must be arranged.
- The fact is that these are the dividing lines between capitalism and culture - that's what the Tories want.
They want an isolationist and capitalist philosophy.
You can not do it with culture, you want culture to exist all over the world, he says.
The musicians 'association Musicians' union is also worried about what might happen when freedom of movement is restricted.
- I think it will have a profound effect on our industry.
It is fundamental that we have this frictionless exchange, for the sake of music, says Secretary General Horace Trubridge.