Recent Met Office and European model runs indicate a building ridge of high pressure over the UK, with southerly flow advecting warmer air masses northward and limited cloud cover expected through early August, positioning London’s maximum temperature near the 30–31°C threshold on August 3. Ensemble spread remains modest but centers on these values because small differences in boundary-layer mixing, afternoon insolation, and the precise timing of any weak frontal passage can shift the daily peak by 1°C. Historical August climatology shows a mean maximum of roughly 22°C, yet the current pattern aligns with the upper tail, consistent with the market’s near-even split between 30°C and 31°C outcomes and the rapid decline in probabilities beyond 32°C. Updated model guidance and observational trends over the next 48 hours will provide the clearest signals for any last adjustments in trader positioning.