no photography in parliament square?

last week, while covering the protests on budget day, i wandered on to the grass at parliament square. a heritage warden and various police told me both that i couldn't be there, and i couldn't take photographs there. holding my ground and after further inquiry, i was told by the head of the security company managing the 'heritage wardens', that the GLA have a list of websites that the bye-laws prohibit posting to, even non-commercially. the GLA press officer has so far failed to respond to my calls asking for a copy of that list.

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photography_bye-laws.mov.mp4