Amazon FBA UK inventory shipping from Europe after Brexit

Hello,

Maybe anyone already shipped their inventory from EU to UK FBA since the Brexit happened? Are there any import charges on packages that are shipped to FBA? Because you do not actually sell the goods, you ship these to be sold afterwards so just wondering if you have to pay any fees while the package goes through customs and then claim the paid VAT or it is considered as inventory moved between different company branches as there are no fees to be paid (because the invoice is issued from our comany with local VAT to the same company with GB VAT)? Just want to be sure we fill out the documents correctly before shipping.

Please, someone, assist, 🙏I think there are a lot of us looking for the same answer now.