This is what the Met put out in February which was specifically in answer to the new amendment about taking pictures of police officers. The stuff they have put out recently is good and I will get hold of a copy and post it.
At the risk of dragging up the new Counter Terrorism Act I spoke to the press department at work ( New Scotland Yard ) I they sent me the below quote and said it was okay to post here but I should not discuss it!!!!
The Met regularly meets photographers and their representatives and listen to their concerns.
Under the new legislation it will be an offence to elicit, publish or communicate information about members of the armed forces, intelligence services or police which could be useful to a person committing or preparing an act of terrorism.
However, it is important to stress that the new offence is not intended to target or impede professional or amateur photographers, but rather to provide additional protection to front line personnel from possible terrorist attack.
Taking photographs of police officers would not - except in very exceptional circumstances - be covered by the new offence. For the new offence to be committed the information would have to raise a reasonable suspicion that it was intended to be used to provide practicable assistance to a terrorist.
Officers have been briefed on this issue and guidance on dealing with the media and photographers is available to them