There is another proverb: A fish rots from the head down. There is no hope for getting rid of corruption if it is condoned (or even encouraged) from the top. If photographing an officer is not currently a crime, it soon will be. If the Public Order and Security Act doesn't have a relevant subsection, would-be 'do-gooders' can try espionage charges for size.
Carry on citizen, there is nothing to see here.