This project record covers the comprehensive atmospheric monitoring and modelling campaign conducted under the West Midlands Air Quality initiative. The primary objective of this research is to evaluate spatial and temporal variations in urban air pollution across the West Midlands metropolitan region, identifying key pollution drivers from transport, domestic combustion, and industrial activities. Backed by environmental science expertise, the overarching programme aims to provide actionable evidence to support policy-making, public health interventions, and environmental management strategies for regional stakeholders. This overarching project coordinates multiple independent observational and modelling streams, providing the framework for the specific datasets linked within this archive.