Police in England and Wales will now be required to collect ethnicity and nationality data in child sexual abuse cases following a review by Louise Casey. The review highlighted the need for better data on the ethnicity of perpetrators and victims, revealing a disproportionate number of suspects from Asian backgrounds in certain areas. Home Secretary Yvette Cooper emphasized the importance of addressing these findings to combat criminality without marginalizing communities. The review also recommended tightening laws regarding consent for minors and making data collection mandatory.