The Met Office's August 11 assessment that summer 2026 needs only near-average or slightly below-average conditions for the rest of August to exceed the 16.12°C UK mean temperature record set in 2025 underpins the elevated market-implied odds. Provisional data through August 10 show a June–August mean of 16.48°C (1.88°C above the 1991–2020 baseline), driven by repeated heatwaves, the first year on record with 35°C+ readings in May, June, and July, and more days above 30°C by mid-July than occurred throughout 1976. Recent peaks reaching 38.1°C at Kew Gardens on August 13 further widen the margin. With meteorological summer nearly complete and official monitoring confirming sustained warmth, traders view a new record as the high-probability baseline, tempered only by residual uncertainty over final August anomalies and verification timing.