No specific published evidence detailing the Department of Health inviting the Royal College of General Practitioners to explore extending child patient registration to include wider social and developmental issues has been identified within the provided official sources. While GOV.UK search results indicate content related to 'health department should,' no specific feasibility studies or changes to patient registration processes directly addressing this recommendation are detailed. The Laming Inquiry was published in 2003, and no further specific evidence has been identified since then.