Learning about VAT

ADDITIONAL INFO I want to add that although the customer expects to not pay VAT for the goods when they are supplied, they do expect to pay VAT when we invoice them for the goods they have sold.

A customer of ours is opening 2 branches in 2 different EU countries and wants us to supply these shops. We supply goods to them on consignment (we don't charge the customer at the point where the goods are supplied, we invoice them for cards after they have sold them in the shops). I don't know 1. what to do about documentation the the goods are sent to these countries (the customer does not expect to pay local VAT on the goods supplied), and 2. what to do about invoicing our customer. The amounts involved are small (perhaps £100 to each of the 2 countries country per month). In future it is likely that this customer will open branches in other EU countries. We are registered for VAT in the UK but not in any other countries.