Standards move: 14 UK construction standards that changed in 2025-26 and where they bite

Every acceptance criterion in every document we sell cites a standard, and standards move. On 17 September 2026 we ran the first full check of the register behind the packs, more than 900 cited designations, against the NBS Publication Index and the other primary sources, and then worked through the hits. These are the fourteen that bite on a UK construction contractor's documents, what replaced what, and which pack each one touches.

The fourteen

1. BS EN 166 is withdrawn. Eye protection is now specified to BS EN ISO 16321-1:2022+A1:2025, with BS EN ISO 16321-3 for the mesh and welding parts. Every RAMS, COSHH assessment and PPE matrix that says "safety glasses to EN 166" is citing a dead standard, though the stock in your stores still carries the EN 166 marks and will for years. We name ISO 16321-1 and keep the legacy mark in brackets. Bites: the Site Health & Safety Pack (done) and the RAMS worked examples (next).
2. BS 5975:2019 became two parts. BS 5975-1:2024 covers procedures and BS 5975-2:2024 falsework design; the single 2019 document was withdrawn on 18 December 2024. A temporary works procedure citing "BS 5975:2019" is out of date, and a register that does not distinguish the procedural part from the design part will confuse a temporary works coordinator. Bites: the Temporary Works Control Pack and the formwork and falsework lines in the civils ITP library.
3. BS 7671:2018+A4:2026. The fourth amendment to the Wiring Regulations is current, and the packs record A3:2024 as ceasing to be current on 15 October 2026. Every electrical ITP, check sheet and test record cites it. Bites: the free ITP, the ITP Starter Pack (M&E), the Commissioning & Test Plan Pack and the Construction Records Library.
4. BS 5839-1:2025. The fire detection and alarm code of practice for non-domestic premises was reissued on 30 April 2025 and the clauses were renumbered; the FIA's guide to the changes sets out where. A fire alarm ITP that cites the 2017 clause for commissioning now points at certification, and the cause-and-effect matrix is expected in the handover documentation. Bites: the fire alarm ITP in the M&E pack, the commissioning pack and the Handover & Close-Out Pack.
5. BS 5266-1:2025 with BS EN 1838:2024. Emergency lighting: the escape route illuminance criterion moved from the centre line to across the width of the route (not less than 1 lux, excluding the outer 0.5 m each side), with 0.5 lux for open areas. A commissioning check that measures the centre line only is measuring the wrong thing. Bites: the emergency lighting ITP, the commissioning check sheets and the test records.
6. BESA TR/19 is withdrawn. Ductwork cleanliness is now TR19 Air, Version 2 (2026), and kitchen extract is TR19 Grease (the August 2020 issue). A cleanliness certificate citing "TR/19 3rd edition" cites a withdrawn document. Bites: the ductwork cleanliness record in the Records Library and the kitchen extract ITP in ITP Library Volume 3.
7. BS 8300 split. BS 8300-1:2018 covers the external environment and BS 8300-2:2018 buildings; the undivided 2009 edition is withdrawn. Accessibility lines in a handover deliverables schedule need the right part. Bites: the Handover & Close-Out Pack and the accessible-installation notes in the M&E ITPs.
8. BS 7976 to BS EN 16165:2021. The pendulum slip test is now specified in the European standard; BS 7976 parts 1 to 3 are withdrawn. Floor finish handover evidence should cite the 2021 method. Bites: the Handover & Close-Out Pack.
9. BS 1377-4:1990 to BS 1377-2:2022. Compaction testing for earthworks moved parts when BS 1377 was reorganised. A compaction record citing Part 4 is citing a withdrawn document. Bites: the earthworks compaction record in the Records Library.
10. BS 8212:1995 to BS 8000-8:2023. Dry lining and gypsum board workmanship now sits in the BS 8000 workmanship series. Bites: the plot completion checklist in the Housing & Fit-Out Completion Pack and the dry lining ITP notes.
11. BS EN 124 is a series. Gully tops and manhole tops are covered by BS EN 124 Parts 1 to 6:2015, with the classes in Part 1 and the material-specific parts after it; the undivided 1994 document is withdrawn. Bites: the drainage ITP in the civils library and the drainage checklist in the Quality Audit & Reporting Pack.
12. BS EN 10025 is a series. Structural steel is BS EN 10025 Part 2:2019 for the non-alloy grades S275 and S355, with the later parts for the fine-grain and weathering grades. A materials approval schedule citing "BS EN 10025" without the part is not wrong, but a mill certificate is checked against the part. Bites: the structural steel ITP, the Materials & Procurement Control Pack and the steelwork audit checklist.
13. CIBSE Guide M, 3rd edition, 2023. Maintenance engineering and management, the reference for O&M manual structure and maintenance schedules at handover. The NBS index still carries only the withdrawn 2008 and 2014 rows; the current edition is on cibse.org. Bites: the mechanical and electrical O&M lines in the Handover Pack deliverables schedule.
14. BS EN 16282-1:2026. Commercial kitchen ventilation. The 2017 edition's own index page records it as superseded by the 2026 text, even though the 2026 row had not reached the index list on the day we checked. Bites: the kitchen extract ITP in ITP Library Volume 3.

Also moved this year

Three management system standards have new editions: ISO 14001:2026 (adopted as BS EN ISO 14001:2026 on 15 April), ISO 19011:2026 (BS EN adoption 9 June) and ISO 9001:2026 (published 16 September, UK adoption pending). BS 8214:2026 for fire door installation, BS EN 206-1:2026 and 206-2:2026 for concrete, BS EN 12845:2015+A2:2026 for sprinklers, BS 7273-4:2015+A2:2023 for fire door release and BS EN 15978:2026 for whole-life carbon assessment have all superseded the editions many documents still cite. Each has its own pack note, and the two ISO revisions have their own posts.

How to find yours

Take every standard cited in your quality plan, ITPs and RAMS and put them in one list with the edition as written. Check each one against a primary index: the NBS Publication Index carries the supersession history for British Standards; en-standard.eu gives release dates; cibse.org, hse.gov.uk and legislation.gov.uk for their own publications. Two traps we fell into. A base standard that has become a multi-part series shows as withdrawn when only the pre-series base document is, and the index list can lag a new edition that its own detail page already names. Write the check date on the list. Then do it again before every tender submission, because the reviewer on the other side has a list too.