You will always pay VAT.
Import duty varies. You can determine it from these sites. Customs doesn't always agree with my choice though.
http://194.223.26.57/icn/main.cfm
http://europa.eu.int/comm/taxation_c...en/tarhome.htm
Another site I found useful:
http://www.sloanefox.freeserve.co.uk/importukduty.htm