Official Met Office observations from London stations, including central sites like Kew Gardens and Lord's, recorded a daily maximum of 26°C on August 18, 2026, following the mid-August heatwave peak of 38.1°C. This aligns with forecast models showing post-frontal cooling, moderate Atlantic airflow, and temperatures returning near seasonal averages after sustained high pressure. Trader consensus at 100% for 26°C reflects verified station data resolving the market, with historical baselines for late August around 22–24°C providing context. Revisions to official records or inclusion of outlier suburban stations exceeding 26°C remain the only realistic challenges, though unlikely given multiple confirming reports.