Clean Energy

Eleven sites, metered one at a time

Sixty-two gigawatt hours moved off grid supply between 2021 and 2026. The number could have been produced in an afternoon by taking the group's total consumption and the group's total renewable contracts and dividing one by the other. That version would have been higher, tidier, and would have hidden the three sites where nothing changed at all.

Instead each site was metered on its own and read monthly for five years, and the sites that went backwards stayed in the table beside the ones that improved.

How it was counted

On-site generation and purchased supply were kept separate throughout, because they support different claims and fail in different ways. Generation stops while a roof is being worked on; a contract stops when its term runs out, and only one of those ever shows up in a meter reading.

• Generation metered at the point of use, not inferred from installed capacity
• Each site's displacement calculated against its own grid intensity, year by year
• Contracts read individually: which changed the emissions figure, which changed only the paperwork
• Three sites with no improvement reported as such, every year, by name

What the figure excludes

Heat. The programme covered electricity only, and three of the eleven sites still run gas boilers that no part of this number touches. Reporting the electricity figure without saying so would have made a partial decarbonisation read as a complete one.

A group average would have hidden the two sites that moved the wrong way. Those were the two worth a conversation.

What the client holds now

Five years of site-level monthly data, the contract analysis, and the uncorrected figures alongside the degree-day corrected ones. Keeping both versions means a mild winter cannot be mistaken for an improvement, which is the distinction a single group figure had been quietly swallowing.