The Government has threatened Birmingham's under-fire childcare agencies with further action unless it sees rapid improvements in services.
Commenting on the findings of the report into toddler Keanu Williams' murder, Children's Minister Edward Timpson said, "This is an awful case and the Serious Case Review (SCR) shows that improvements are urgently needed."
He continued: "I have issued the council with a final warning - Ofsted will return to Birmingham this autumn to determine what progress has been made.
"There is no quick fix, however I have been very clear with Birmingham that unless I see rapid improvement further action will follow."
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Arthur Simpson-Kent, 48, admitted killing Ms Blake and their sons according to his lawyer.
Two brothers have been arrested on suspicion of murder after their parents were found dead in their own home over the weekend.
The first man to be convicted of murder on the basis of DNA evidence should be moved to an open prison, according to the Parole Board.