There have been plenty of articles covering Alan Given's extraordinary interview, in retirement, of the events covering the death of De Menezes. Perhaps it is an attempt by a loyal police officer to defend his superior by providing independent corroboration of his story although this would have a counterproductive effect. In the short-term, it would be considered an effort that undermines his position; in the medium term, perhaps a valuable support. Or it may have been another spin campaign to the newspapers, setting the agenda: though this obvious ploy has done the opposite.
Whatever the motive, the interview has not enhanced Sir Ian Blair's reputation amongst the public or commentariat in the short term. Therefore, was it aimed at a more select group? The Police Authority considering Blair's position, as a counterweight to reports that some of the group wish that he was ousted.
Another small point: if the officers were buoyant after they shot De Menezes, in the belief that they had killed a terrorist. Their commanding officer did not identify the mistakes that were made in identification that led to this death. But, most damning of all, there was no awareness that a mistake might have been made, that the procedures had not been followed as they were supposed to. Not good.