In a sane world UK VAT for customers in the EU would be like customers in the US. I.e. pretty simple. At the moment if we have an EU customer then we have to worry about whether they are a person or a business, VAT registered or not, what is their VAT number, what is the VAT rate in their country, and so on. Lots of nonsense to go through. I never understood VAT, we go through all that and if you are VAT registered you get it all back anyway. But it keeps bureaucrats in work, people who are otherwise without any utility, and that's the real reason behind governments, especially in the EU where very few people have any utility other than an ability to fill in forms.
But the EU and Theresa the Appeaser will no doubt 'negotiate' something even more burdensome that what we have already.