This report describes the follow-up of the Helping Children Achieve (HCA) study. The aim of the study was to assess the longer-term effectiveness of three different parenting programmes to reduce anti-social behaviour and improve reading in primary school children aged 5-7. The original trial took place between February 2008 and March 2012, and the follow-up between September 2102 and January 2014. It was undertaken as part of the work of the National Academy for Parenting Practitioners, a large nationwide initiative to increase understanding of how best to improve parenting, and to provide training in effective methods. The findings from this trial can help inform which type of early intervention parenting programmes should be deployed to improve children's adjustment and life chances by reducing their levels of anti-social behaviour and improving their literacy. (author abstract)