This document summarizes the findings of an 18-month study in England on the state of urban green spaces and their impact on public health and well-being. The study analyzed over 70 data sources and inventoried over 16,000 green spaces. It found that almost 9 in 10 people use parks, but the most deprived areas have 5 times less green space. The quality and amount of green space varies depending on the affluence of the area. Residents in more deprived areas report lower quality green spaces and see fewer health benefits from improved access. Next steps include promoting best practices for green space management and developing common data collection methods.