Recent Met Office guidance and ensemble forecasts point to a moderating Atlantic flow replacing the mid-August heat dome, with London maxima likely peaking near 24–26°C on the 18th amid increasing cloud and scattered showers. This shift from the 36–38°C peaks recorded earlier in the week has compressed market-implied probabilities around 24–25°C while leaving room for variance driven by exact timing of frontal passages, boundary-layer mixing, and urban heat-island effects. Model spreads remain notable because small changes in low-level wind direction or insolation can shift the daily high by 2–3°C; traders are therefore weighting the most recent high-resolution runs and the next Met Office update as the key near-term catalysts.