By Joanne McCartney Universal free school meals are fairer, better for the economy and good for children’s educational outcomes, says Joanne McCartney Elections and manifestos are about priorities and Sadiq Khan has decided that feeding all state primary school children and supporting families through the cost-of-living crisis is a top one for him. Free school meals are great value for money. The mayor has already shown he can deliver his free school meals programme in London for two years, which has proven to be a lifeline for families and has led to children having greater concentration leve…