Evidence / Understand the evidence
What independent-school examples can tell you about buying value
School-owned evidence can show how energy work fits a real estate and leadership structure. Read the result, its date and its limits before using it to support your own buying decision.
Ask what kind of evidence you are reading
A school’s own account, an adviser’s case study and a model of possible savings answer different questions. A useful case identifies the school, work undertaken, period, baseline, result and source. Check whether a figure describes an opportunity, an implemented measure, reported consumption or a confirmed financial outcome.
The examples below illustrate independent-school experience and responsibilities. They do not establish that appointing a TPI causes a particular saving, that a provider is right for your school or that the same procurement route applies. Use each example to improve your service brief and the evidence you request.
Winchester College: an operational example with a defined historical boundary
In a November 2022 HMC article, Winchester College’s bursar described the challenges of its historic boarding campus. He reported that selected boarding-house retrofits had reduced gas consumption by 60% and electricity by 20%. The article also discussed whole-campus planning and feedback from metered energy use.
These are school-leader-reported results from particular work, published in 2022. The article does not provide a complete normalised baseline, cost ledger or independent verification of those percentages. It does not establish a TPI’s contribution or the net financial return from appointing one. A school should retain those limits beside the figures.
Uppingham: a model of connected responsibility
Uppingham School’s school-hosted energy and sustainability role description, version dated 20 June 2022, connects energy procurement partners, secure supply arrangements, metering, forecasts, monthly financial reporting and consumption reduction. It also describes reporting on implementation to the bursar and trustees.
This is evidence of a stated role and management model. It is not a measured saving or confirmation that every responsibility has been delivered. Its useful lesson for a buying brief is the connection between commercial purchasing, technical work and accountable school leadership. The arrangement should be scaled to your school’s actual resources.
Wellington in Somerset: activity is different from a quantified outcome
Wellington School in Somerset reports on its own sustainability page that it undertakes energy audits and has installed LED lighting around its campus. The page shows that energy work can sit alongside staff and pupil engagement. It does not provide a complete quantified account of the resulting financial benefit.
Do not confuse this independent school with Wellington School in Timperley, Altrincham, the school identified in a separate supplier-published audit case. Similar names are insufficient to establish an institution’s identity. Before using a case, verify the location and legal school and keep the original source with the evidence record.
Keep examples and projections visibly labelled
ISBA’s May 2022 guidance contains representative day-school and boarding-estate scenarios. They help readers recognise different building, metering and operating challenges. They are illustrative pathways rather than completed named-school transactions. A projected intervention or example chart should remain labelled as a proposal or model.
The same discipline applies to provider material. Ask which actions were implemented, who paid for them and what period the figures cover. Seek original meter and financial evidence where appropriate and permission to use it. An attributed quotation can support the fact that someone expressed a view; it cannot fill a missing calculation.
| Published material | What it supports | What remains to establish |
|---|---|---|
| Winchester bursar article, 2022 | School-reported operational experience | Comparable baseline, costs, verification and causal attribution |
| Uppingham role description, version 2022 | A stated responsibility and service model | Actual delivery and measured outcomes |
| Wellington Somerset school page | Reported audit and lighting activity | Quantified net benefit and measurement method |
| ISBA representative pathways, 2022 | Different estate and operating questions | A real school outcome and transaction evidence |
Check whose population a report describes
DfE’s June 2026 Energy for Schools benchmarking report included only records linked to state-funded schools. It can help readers understand the importance of matching consumption and time periods, but its historical results are not findings about ordinary fee-funded independent schools. Do not copy its median percentages into an independent school’s forecast.
For any wider research report, record the population, sample, dates and method before applying its findings. A report can support better questions even where it cannot establish an expected financial result for your school. Keep that distinction visible in the buying recommendation.
Bring the lesson into your own decision
Select the relevant question: do we understand our demand, have competent support, retain accountable leadership or measure what happens after award? Translate it into a deliverable and a school owner. Avoid copying a percentage into your budget because another school had a broadly similar estate.
For your own case file, retain the original consumption, operating assumptions, implementation record, complete costs and subsequent results. Separate tariff, tax, consumption and one-off corrections. The strongest evidence at the finish explains what was bought, what changed and which uncertainties remain. Use the benefits method next to organise that assessment.