So (if I've got this right) a search on
www.bt.co.uk for Webwise returns one result, which takes you to a broken link on a US web server where you will be able to 'opt out'.
The confusingly similar UK site (which you can't find on a BT search) may resolve to various addresses outside the BT network, and may even resolve to a machine owned by Phorm/OIX.
At least when you are assigned your UID it won't be possible for Phorm to link it to your... oh God....
---------- Post added at 22:15 ---------- Previous post was at 22:08 ----------
From
www.webwise.bt.com
How do I switch BT Webwise on or off?
When BT Webwise is available in your area, simply go to www.bt.com/webwise and click 'BT Webwise Off' or 'BT Webwise On'.
However
www.bt.com/webwise
redirects to
http://www.webwise.bt.com/webwise/index.php (ie, the US "ThePlanet.com Internet Services, Inc." server)
So even when you think you're visiting a
www.bt.com url, you're being sent to the states to opt in/out.