I think the EU Single Market stuff only applies to laws that governments make. As someone from a small EU member state (Ireland) that's close to a large EU memb

I think the EU Single Market stuff only applies to laws that governments make. As someone from a small EU member state (Ireland) that's close to a large EU member state (UK), I can tell you that lots of companies, big and small, will happily sell you to the UK but not Ireland.