**High pressure building across southern England is driving trader consensus toward a peak of 32–33°C in London on July 29, with Met Office guidance indicating a maximum of 33°C under mostly sunny skies and light winds.** Recent model runs show warm southerly flow advecting air from the continent, supporting daytime highs several degrees above the July average of ~22–24°C, consistent with the ongoing warm spell across southeast England. Minor forecast spread arises from differences in predicted cloud cover timing, boundary-layer mixing, and the strength of the urban heat-island effect in central London, which can add 1–2°C locally. Official agencies such as the Met Office and ECMWF continue to converge on dry, stable conditions with little risk of significant cooling until later in the week, leaving the outcome sensitive to the final 24–48 hours of model updates. Traders therefore assign the highest implied probabilities to the narrow 32–34°C band while assigning low odds to extremes below 30°C or above 35°C.