Author: Oliver Wakefield-Smith, Founder Digital Signet. Reviewed against DfE Sustainability Strategy (Mar 2025) and Education Estates Strategy (Feb 2026). Verified 22 June 2026.
schoolnetzero.co.uk is operated by Digital Signet, run by Oliver Wakefield-Smith. The site is one of a portfolio of independent reference sites covering procurement-grade cost data for UK and US buyers.
schoolnetzero.co.uk is operated by Digital Signet, run by Oliver Wakefield-Smith. The site is one of a portfolio of independent reference sites covering procurement-grade cost data for UK and US buyers.
Every numeric claim on the site cites a primary URL. The methodology page (assumption register A1 to A24) maps every worksheet calculation step to one or more sources. The site does not accept consultancy fees from suppliers.
The methodology is reviewed quarterly. Specific anchors (Ofgem cap, PSDS bid window) are checked at higher frequency. The Source-of-record banner on every page records the last full review date.
MATs needing a bespoke board paper using their own GIA, age and fuel data can use the worksheet directly or contact Digital Signet for a one-off tailored output. No engagement fee for the standard board paper format.