Her family say knowing Wayne Couzens will be behind bars forever "brings some relief".
The serving Metropolitan police officer made a fake arrest in Clapham in March, then raped and murdered the 33-year-old.
Home Secretary Priti Patel says the force needs to be held to account.
Mitcham and Morden’s MP, Siobhan McDonagh, says it’s high time to do something about easy access to pornography.