Metropolitan Police Commissioner Bernard Hogan-Howe wants to cut all crime. He says as far as he is concerned "all crime matters".
He added: "If we can cut all crime then we will end up with a happier and a more confidant London - a place people want to invest, people want to visit and I'm confidant we can do that in the future".
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Muslim leaders condemned the "heinous and appalling" Westminster terror attack.
Travis Frain is recovering in hospital and has posted a photo to Twitter of Prince Charles by his bedside.
Acting Commissioner Craig Mackey led new policemen and women in paying their respects at a passing-out parade in Hendon, north-west London.