All items on the website have a weight and the website has a record of the delivery costs for different weights to each country. Carriage is then charged according to the order weight and destination.
Following the UK Customs & Excise guidelines, VAT is charged on carriage at the standard rate for orders within the EU, except for orders where the goods are zero rated. In this case, if an order consists solely of zero rated items (ie. books or teas), no VAT is charged on the carriage either.