I've just had a thought (just the one :P) If BT couldn't drop the cookie due to their T's & C's, what would be the legal viewpoint of engaging someone else to drop the cookies for you? Wouldn't that be a breach of T's & C's as it was part of a BT trial?
<hypothetical situation>
In other (very old) news..
Re-wind 8 years..
http://www.theregister.co.uk/2000/12..._right_to_spy/
fast-forward 8 years to current scenario
* ISP's have stated they *cannot* store this level of data
* ISP's have now proved they *could* store this level of data
* Government let's ISP's track users data connections without legal recourse
* Government makes ISP's *keep* the data they intercept
* Government gains access to ISP's stored data
Far fetched? It isn't a conspiracy theory, it's a conspiracy.
</hypothetical situation>
Alex : you mentioned a couple of times that Chris@El Reg had mentioned the leaked document in an article already published, could you let us know which one please? Ta.