Independent British researchers and experts have raised serious concerns about the deteriorating health of children under the age of five in the UK. The report by the Academy for Medical Sciences highlights a range of health issues, including rising rates of obesity, tooth decay, and infant mortality. The Royal College of Paediatrics and Child Health warns that the UK is failing to provide a healthy start for its children, and the NHS faces significant challenges in addressing these issues. The report calls for urgent action and a clear cross-government strategy to protect the health and future prospects of children.