Shipping from Australia to UK AMAZON FBA - Customs and VAT questions


I am registered for VAT within the UK
Do i still have to pay VAT for my exports from Australia to the UK to customs aka royal mail? or do i just do a Vat statement to HMRC and pay the vat then? and my goods pass through customs to FBA without having to pay vat at that point?

Any advice in sending my first shipment to UK FBA would be appreciated from Australia or any other country that has to pay VAT on the shipment.

I have run this business and have sent parcels direct to customers and they where sometimes charged VAT. As i am not shipping to a customer but FBA itself , i am not sure how it works.

thankyou for any help