The assisted suicide bill was "stacked round with safeguards" to prevent a sick or elderly relatives from being "pushed into death", one campaigner told Good Morning Britain.
Prue Leith, who lost her brother to bone cancer, said she was "not asking for euthanasia" but wanted to give the terminally ill the option of a peaceful death.
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Legal action has been threatened against the Parole Board if it does not disclose the reasons behind its decision to release John Worboys.
The PHE will review the evidence and also make recommendations on how to address the issue, according to health officials.
The Commons Public Accounts Committee (PAC) said at least £9 million has been squandered on a project that failed to deliver.