The provision of information on the environmental and health harms of eating meat to adult consumers has not succeeded in influencing behaviour change. Enabling school-aged children who are in their early formative years to adopt healthy and sustainable food choices through education, provision of plant-based school meals, and including plant-based cooking lessons has the potential for large-scale dietary shifts. According to the standards for school meals, lunches at school should have at least one portion of fruit and vegetables in England and at least two portions of vegetables and one portion of fruit in Scotland and Wales and all these guidelines encourage the provision of meat and poultry in the school meals with some restrictions to red meat and processed meat. These guidelines need to be reviewed and updated to promote predominantly plant-based meals along with the substitution of red meat and processed meat ideally with plant-based sources of protein, but using locally sourced poultry and seafood wherever necessary. Successful initiatives such as ProVeg UK’s School Plates help improve the health of school children and the planet while cutting costs.