that "you have rights to go and view what pictures there are of you"?
I know of no such 'right' at all, but I'm happy to be proved wrong.
Shops and businesses do not have to display a warning that CCTV is in operation - they do so because it acts as a deterrent; if you know you're being filmed you are less likely to commit an offence.
As far as I can see the fact that CCTV is in wide use doesn't impinge on your civil liberty in any way - it's the old story, if you are doing nothing wrong you have absolutely nothing to fear from it. In fact you should feel reassured - CCTV has been instrumental in helping to reslove thousands of crimes, and has probably prevented thousands more.
As far as the Liverpool Street station incident is concerned, the Police prevented people from taking photographs during the arrest of two women in the station. It was done for security reasons - the officers involved do not want their photographs being taken by all and sundry. They are working very long hours under sometimes dangerous conditions, and the last thing they want is to have their photographs splashed across every subversive web site on the planet.
Please think about the implications before you go posting "Big brother" comments. If you were arresting terrorist suspects would you want to be photographed in the act by a few hundred people, some of whom could well be terrorist sympathisers themselves? Like millions of others I live and work in London, and I move around it every day. Personally I'm grateful to the Police for what they are doing at the moment, and I think we should cooperate with them in any way we can - not spend our time sniping at them in web forums.