Building on Success, was the second phase of the Early Years Professional Development Programme (EYPDP). The programme, funded by the Department of Education and delivered by Education Development Trust with key subject specialist partners, was aimed at improving practitioners' understanding and skills in supporting the development of the most disadvantaged children between the ages of 2 and 4 years old in England. The original programme was delivered in 50 of the most disadvantaged Local Authority (LA) areas in England (based on free school meal eligibility and EYFSP outcomes data), using a cascade model of delivery. Early Years Practitioners (EYPs) underwent the training first and were provided with additional training to become Champions, who would in turn train peers in their LA area. The first phase commenced in June 2019 but in response to the impact of the COVID-19 pandemic, a new phase of the programme was commissioned to start in September 2021. As lead contractor, Education Development Trust worked with expert contributors to provide a broad curriculum -- Elklan Training Ltd for the speech, language and communication content as well as the cohort of Programme Trainers; the Anna Freud Centre for the PSED content and early years Maths experts Dr Cath Gripton and Dr Sue Gifford for the Early Maths content. Phase two of the programme utilised a direct delivery model; a mix of self-guided eLearning and webinars hosted by professional tutors. 51 new Local Authority areas took part in the programme with EYPs completing the programme between January and July 2022. During their time on the programme EYPs were asked to contribute to the programme evaluation and this report highlights the methodology used and the highlights of the findings -- it clearly demonstrates the outcomes and impact that was created during what was a relatively short intervention. This evaluation was commissioned by Education Development Trust as part of our commitment to evidencing the Impact of our programmes on our beneficiaries. However, both EYPDP Phase 1 and 3 will be subject to an external analysis commissioned by the Department for Education.