ABSTRACT Acute coronary syndromes (ACS) are a common cause of morbidity in the UK. The mainstay of treatment is percutaneous coronary angiography (PCA) +/− percutaneous coronary intervention (PCI). In the Northwest sector of Greater Manchester and Salford, PCI labs are shared between hospitals and trusts, co-ordinated by a bespoke online administration system which routinely collects clinical and demographic data for patients requiring angiography. We are not aware of data from such systems previously being analysed and used to guide health service management. We isolated and linked this dataset for the year 2018 with other admission data to explore variations in the time spent on this treatment pathway (from admission to angiography). Unadjusted analysis shows pathway time is affected by weekday, date of admission, age and gender. Regression analysis using demographic and clinical variables shows a persisting disparity according to admission site and gender, with ethnic disparities that are challenging to explain. Although an observational study, the dataset is collected prospectively and has excellent granularity. As well as demonstrating feasibility of use in investigating equality of access and treatment, we demonstrate its utility for service development, management, and improvement. These methods are easily replicable across other clinical systems and specialties.