I got free delivery because I bought for more than Euro 350 of not-reduced items. Normally I pay Euro 25 for delivery, and Euro 15 for returns. That really did hurt last sale, as I had 7 deliveries, and something to return from 6 of them. As the customs declarations are made for each single delivery, it is not possible to bundle them, unfortunately.
Toast - or their courier - takes care of the customs declarations, so I don't pay any extra tax or fees. But the prices in Euro is 1,5 times the prices in £, which is totally ridiculous.
Years ago I could buy from Denmark and pay the prices in £. But well before Brexit this changed.