Recent Met Office and BBC forecasts indicate an overnight low of 16–18°C for London on August 10, driven by a stable high-pressure regime promoting clear skies and moderate radiative cooling overnight. Light winds and a mild southwesterly flow limit mixing with cooler air aloft, while the urban heat island effect tempers the minimum in central areas. Ensemble model spreads and subtle variations in cloud timing create tight clustering around 17–19°C outcomes, with traders weighing potential for slightly stronger cooling if skies remain fully clear versus warmer advection if any residual moisture develops. Updated model runs and surface observations over the next 48 hours will refine these probabilities.