EU Contractor working for UK based Agency for EU Based Project

[Thunderforge]

Sorry for the long Title, but please can someone explain the rules here...

As Contractor with a Company based in the EU and working for a UK based Agency after Brexit for a contract based in the EU what are the rules regarding VAT, Invoicing etc. ?

[jezosaurus]

As Contractor with a Company based in the EU and working for a UK based Agency after Brexit for a contract based in the EU what are the rules regarding VAT, Invoicing etc. ?

I used to operate like this way before Brexit.

Every UK agency has told me "no problemo". So I've been avoiding UK agencies, as none of them have explained the change in VAT rules. (I know they've changed - that's all). Get proper advice from your accountant.