But that just becomes a copyright dispute with the country. The only thing preventing Microsoft from just not showing up to your court case is that they have presence there and want to continue doing business in the country. Imagine you write a project and some solo developer in the U.S. (that's not Microsoft) violates your copyright - the only way you would get damages or injunctive relief is by suing them in the U.S. or hoping the U.K. passes a judgement on them and extradites or sanctions them. If they never plan to go to the U.K. and the U.K. doesn't extradite them for nonpayment or noncompliance of whatever judgement you have against them, there's not really much you can do.

https://www.lw.com/thoughtLeadership/enforcement-of-foreign-...