Local authorities in London have developed various collaborative arrangements to commission placements for children in their care. In recent years, local authorities have been operating in a climate of limited resources and increased demand for children's services. They have been asked to make efficiencies and, at the same time, ensure children are in placements of the highest quality, where they can thrive. ALDCS asked London Councils to conduct a wider review of the arrangements for commissioning fostering and residential care currently operating in London, with the purpose to explore ways of improving the system and practices. This research will inform the second report of the review and will build on both the first part and the previous Oxford Brookes University study published in July 2015.