Official Met Office observations for London stations, including Greater London and nearby references like Heathrow, confirm a minimum screen temperature of 8°C on May 14, 2026, primarily recorded during early morning hours amid persistent low cloud cover and light northerly winds that suppressed radiative cooling overnight. Hourly data shows temperatures stabilizing around 7–9°C pre-dawn after evening readings in the mid-teens Celsius, aligning with forecast model consensus from the UKV and ECMWF ensembles predicting mild lows for urban London under these synoptic conditions. Trader consensus at 100% implied probability on 8°C reflects this verified data from authoritative sources, with historical May norms (average min ~9°C) providing further context. Realistic challenges would require a post hoc revision from quality-controlled archives or an overlooked rural station reading below 7°C, though urban heat island effects and cloud insulation make sub-6°C unlikely.