It seems that the 'Jamie Oliver Effect' shows no signs of abating. Following on from his TV series on improving school dinners and the subsequent 'Feed Me Better' campaign, the Institute for Social and Economic Research at Essex University has now published Healthy School Meals and Educational Outcomes, a report which examines Key Stage 2 outcomes before and after the reforms introduced by Oliver's campaign. The study concludes that healthy school meals have indeed had a positive impact on educational outcomes.
For further reading on the same topic, try looking at The Link Between Child Nutrition and Health: an Overview of Research in the UK, which was published in August of last year. The websites of the School Food Trust and the British Nutrition Foundation are also useful sources of information.