No specific published evidence detailing actions taken to ensure the systematic and rigorous investigation and management of cases of possible deliberate harm to a child has been identified within the provided official sources. While GOV.UK search results indicate the presence of content related to 'investigation management case,' no specific policies, guidance, or legislative measures directly addressing this recommendation's requirements are detailed. The Laming Inquiry was published in 2003, and no further specific evidence has been identified since then.