South Western Railway (SWR) will be seeking information from the market regarding Train Planning Systems capable of supporting the creation, editing, integration, and validation of train schedules, rolling stock diagrams, and traincrew diagrams. The requirement covers systems that provide intuitive planning interfaces, comprehensive visualisation tools, and the ability to manage date‑bound timetable datasets across long‑term, short‑term, and very short‑term planning horizons. The scope includes solutions that can integrate securely and efficiently with Network Rail systems and SWR´s operational, rostering, optimisation, and business platforms, using industry‑standard data formats and APIs. Suppliers are also invited to provide information on systems that support automated validation of rolling stock and traincrew diagrams, including checks against operational rules, formation requirements, mileage constraints, route and traction knowledge, and depot‑specific standards. SWR is additionally seeking insight into system capabilities for secure data exchange, auditability, and reporting, as well as indicative commercial models associated with delivering these functionalities.