It is pretty clear from this judgement that the jury did not believe a word the police officers said.
Obviously the police did not go out to kill an innocent man and were under tremendous pressure on the day in question, but that does not excuse their trigger happy behaviour in shooting Jean Charles De Menezes.
From the court case, it is clear that the police will not be prosecuted for unlawful killing or perjury even when the evidence suggests overwhelmingly that that is precisely what has occurred. One law for the police, another for us mere plebs has to be the conclusion we take. Nothing much changes there then.