Sangeeta Bhatia developed a feature for the UCL/TLOmodel repository that ensures demographic visualizations display age groups in a consistent, predefined order. She addressed the challenge of unreliable age-group ordering by sorting population data before plotting and reindexing the 'num_by_age' variable to match established categories. Using Python and leveraging her skills in data analysis and data visualization, Sangeeta’s work improved the accuracy and repeatability of demographic plots. This enhancement supports more reliable reporting and downstream analytics, as visual outputs now consistently reflect the intended age-group structure. The depth of her contribution lies in its impact on data integrity and usability.