Taking a photograph of a public servant, even if it's to record his wrongdoing, is to be illegal. That's if the photograph is 'likely to be useful to a person committing or preparing an act of terrorism'. How could you prove it wasn't?
Nazi comparisons are horrid cliches; yet my mother watched Nazism take hold as she grew up in rural East Prussia. Tyranny advances step by step, and one of its most useful allies is a natural disinclination to believe where it is heading.
Another ally of the tyrant is woolly language used in law - the freedom of the individual is in the precision of the language that grants powers to his incomparably mightier government.