Jonathan Goulding enhanced the DEFRA/water-abstraction-system by delivering the Return Period Presenter Enhancement for User Notifications. He refactored the returns period presenter and its associated tests, updating the presenter logic to reliably format return period data for user notifications. Using JavaScript and front end development skills, Jonathan expanded test coverage to address a wide range of date scenarios, ensuring accurate and consistent display of return period options. His work improved the maintainability of the presenter and its tests, reduced the risk of incorrect notification displays, and contributed to a more robust and user-friendly notification system. No bugs were reported or fixed.