Met Office observations from key London stations, including Heathrow and central urban sites, confirm the highest temperature on April 9, 2026, peaked at 22°C during mid-afternoon amid a mild high-pressure ridge following an unusually warm spell earlier in the week. This provisional data, based on standardized SYNOP measurements, aligns with trader consensus implying 100% probability for 22°C, reflecting the aggregated skin-in-the-game assessment of real-time recordings across the city's official network. While final quality-controlled data from the Met Office is pending release within days, revisions are rare for clear-sky conditions like these; a challenge would require instrument malfunction or overlooked microclimate outlier, both improbable given multi-station corroboration and historical verification precedents.