Met Office guidance and ensemble model consensus currently favor a daytime maximum of 28°C in London on August 8 under high pressure with sunny spells and light winds, though 27°C remains plausible if cloud cover or timing of peak heating shifts slightly. Recent warming from a settled anticyclonic pattern has lifted readings toward the upper end of climatological norms for early August, where historical averages sit near 22–24°C. Traders assign the highest probabilities to 27–28°C because short-range models show tight clustering around these values, with limited convective potential or urban heat-island amplification needed to reach 29°C at official stations. Updated Met Office and ECMWF runs expected in the next 24–48 hours will refine boundary-layer details and resolve remaining spread in the forecast envelope.