How to register for AMS UK outside UK

Hello, we are company based in Riga, Latvia.

We are selling a product line in UK. We have a UK VAT registration number and VAT address(not business address).

We would like to register for a AMS UK.

The first step is to register in amazon vendor express.

The problem is that during registration process in amazon vendor express ( ) we should fill Business address field but there is no country choice, only UK regions.

Our question: can we use our UK VAT registration address in order to register in amazon vendor express?

Does anyone have experience in this kind of situation? It would be great if you’d send us some ideas and hints, so that we could continue researching this mater.

Thank you!