ZAGG Shield is pretty good, I have the complete phone protection, it gives a lot of peace of mind. It does give a slight "rubbery" feeling to the screen, and makes the screen a little less sensitive.
to buy online:
http://www.zagg.com/invisibleshield/...ns-shields.php

http://cgi.ebay.co.uk/ZAGG-Invisible...item5638fb8430

retail locations:
http://www.zagg.com/sellzagg/retail_...?viewcountry=1
England is selectable in the list...