What happened on Artillery Place in Woolwich on May 22 2013 was unique in British military history. Many British soldiers have died in battle. Many have been killed by terrorists.
But only one has been deliberately knocked unconscious by a car and then, in the phrase of the trial judge, "butchered" in the London suburbs in the middle of the Wednesday lunch-hour, as the perpetrators gloried in what they had done.
Now on the first anniversary of his death campaigners for a public memorial for Lee Rigby are renewing their efforts, in the face of curious resistance from the local political establishment.