It looks as if the London JamCams are being censored again, during President Bush's visit. e.g. Whitehall/Parliament Square
It is precisely when temporary road closures etc. are in operation that these low resolution pictures are most useful for steering people away from the affected areas.
There is no security issue with low quality, non realtime pictures, which are delayed for several seconds or minutes.
Which petty official at either the BBC or at Transport for London is in charge of making the decision to censor these JamCams, and under whose orders ?
The secrecy surrounding the excuse not available for operational reasons shows contempt for the public - "we can snoop on you when we want, but we will not share the publically funded data if it suits us".
This is by no means the first time that this censorship has happened, any major street demonstrations seem to trigger this stupid policy.
This imbalance of power, between "us" and "them" lies at the heart of many people's objections to public CCTV surveillance systems.