Commercial buildings over 1,000 m² must reach EPC B by 2031
In mid-June the government published its long-awaited interim response on minimum energy efficiency standards (MEES) for rented commercial property in England and Wales. From 2031, buildings over 1,000 m² will need an EPC rating of B where cost-effective. Smaller buildings stay at the current minimum of E, and the proposed interim EPC C step for 2027 has been dropped. The government estimates tenants of the largest buildings could save around £360 million a year by 2031.
Landlords and tenants planning upgrades will want a clear baseline. Sub-metering shows which systems use the most energy and proves the savings once improvements are made.
El Niño declared
On 11 June the US Climate Prediction Center confirmed El Niño conditions in the Pacific, expected to strengthen into winter 2026–27, with a 63% chance of a very strong event.
Record June heat and a rare grid notice
Lingwood in Norfolk reached 38.0°C on 26 June, a new UK June record, and England had its warmest June since records began in 1884. The grid operator NESO issued a rare summertime Electricity Margin Notice for 24 June because of heat, low wind and limited imports, though it said supplies were not at risk.
Half-hourly settlement passes one third
Elexon reported more than 11.3 million meters moved to market-wide half-hourly settlement, roughly a third of all metering systems in Great Britain. Full implementation is due in May 2027. Half-hourly settlement makes when you use energy matter more, which makes interval data from sub-meters more valuable.
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