UK VAT Certificate - address used on cert. as registered business address is not ours but Avalaras

We signed for VAT Services with Avalara a few weeks ago, provided them with all requested documents and have just received our new VAT certificate with following details:

NOISETTE SRO
LANCHESTER HOUSE
TRAFALGAR PLACE
BRIGHTON
EAST SUSSEX
BNl 4FU
(which is a mix of our company name and Avalaras address in the UK)

However, our registered business address is as follows:

NOISETTE SRO
Czechstreetname 123/12
Czechcity
100 00
Czech Republic

This Czech address has been used in all documents we provided to Avalara and is the only address we use.

When we registered for German VAT in the past (with our other company, not for Amazon FBA purposes and not using Avalara), the certificate we received was stating our regular business address in Czech republic. We believe it should be the same with the UK VAT Certificate.

Am I correct? Is this an error on the side of Avalara an/or the UK authorities, or not?