Recent Met Office guidance and ensemble model runs indicate a largely settled high-pressure regime over southern England tomorrow, supporting mostly sunny conditions and a maximum of 28°C in central London. This aligns with the market’s leading 27–28°C outcomes, reflecting modest uncertainty around boundary-layer mixing and any late-day sea-breeze effects that could cap readings a degree lower or allow a brief 29°C spike. A warming trend since early August, driven by southerly flow, has raised baseline temperatures above seasonal norms, yet increasing model spread on cloud cover keeps probabilities clustered tightly around these values rather than supporting higher outcomes. Updated guidance tomorrow morning will provide the final observational constraints before resolution.