UK built environment · 2011–2026
Each bar runs from publication until the document was superseded, updated or withdrawn — so the chart shows what was actually in force at any point, not just when things were published.
The centre of gravity moves from calculation method, to discipline guidance, to planning policy and net zero definitions — and now toward management, disclosure and the evidence base for regulation.
Selected document
Bars are grouped by the kind of document they are. Solid bars were current at the time; outlined bars have been superseded or updated by a later version. Use the filters to isolate a category, or search for a body such as “CIBSE”.
Reading the chart
The pattern is not simply “more guidance”. Method work consolidates into a single professional standard, discipline guidance fills the gaps that standard leaves open, and policy arrives from the planning system before it arrives nationally.