It is still not clear if investigators from the Food Standards Agency have visited some cutting plants where horsemeat is highly suspected of being stored, Labour's shadow environment secretary has said.
Mary Creagh said the Government needs to be clearer about how its own investigations into the scandal are progressing with different criminal gangs operating across Europe.
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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.