Meanwhile, relatives of Jean Charles de Menezes have said they were "disgusted" to learn of the ennobling of Sir Ian Blair - who is set to become a Lords crossbencher.
In his book about his career in policing, Sir Ian also condemned the Independent Police Complaints Commission (IPCC) for what he described as the "ridiculous delays" and "variable quality" of its inquiry into the 2005 shooting of Jean Charles de Menezes.