If you are in the UK you will be required to pay VAT on goods and postage as detailed on the H.M.R.C website.
EU State members are subject to VAT at your countries tax rate subject to limits for purchases and shipments.
This will be repaid to your member state and reported via the IOSS system. There is a limit for orders up to EUR 150, after which, duties and taxes are the buyer's responsibility.
Purchases from "rest of the world" countries and shipping are exempt of VAT.
All purchases from outside the UK may be subject to import duties in your country.