The National Grid Electricity System Operator (ESO) is a key organization in the United Kingdom responsible for managing the electricity supply and demand across the country. It ensures that electricity is delivered safely and reliably to homes and businesses by balancing the grid in real-time. The ESO plays a crucial role in integrating renewable energy sources, such as wind and solar, into the energy mix. In addition to balancing supply and demand, the ESO also monitors the performance of the electricity network and coordinates maintenance activities. It works closely with energy producers, distribution network operators, and other stakeholders to maintain a stable and efficient electricity system, supporting the transition to a low-carbon future.