Creosote-treated fencing is still permitted in Great Britain, but the rules changed on 1 April 2026 and tighten again on 1 April 2027. HSE renewed creosote approval until 31 March 2033 for railway sleepers, transmission poles and safety-critical fencing requiring BS8417 service factor D.
Non-safety-critical fencing has a grace period until 1 April 2027
HSE gave the supply chain 12 months to adjust after the 2026 renewal decision. Creosote-treated timber may continue to be placed on the GB market for non-renewed uses during that grace period, but from 1 April 2027 it must not be placed on the market for non-safety-critical fencing.
That means the current position in 2026 is transitional. Do not assume that a post being agricultural, equestrian or rural automatically makes it a renewed use.
Safety-critical means the fence needs BS8417 service factor D
HSE’s wording is specific: the renewed fencing use is for safety-critical fencing requiring compliance with BS8417 service factor D. Whether a particular project qualifies is a project/specification question, not something that can be decided just from the words “farm fence” or “horse paddock”.
Creosote remains a restricted professional-use treatment
Creosote is an effective long-life wood preservative, but it carries significant health and environmental risks. UK restrictions mean it is not an ordinary DIY wood treatment. Follow the product label, supplier terms and current HSE guidance, and use suitable protective equipment when handling treated timber.
For general agricultural fencing, compare the other post options
For stock, farm and field fencing that does not require the renewed safety-critical creosote use, compare the wider Agricultural Fence Posts range, including machined round, Cundy, square treated and UC4 strainer posts.
Complete the system with Stock Fencing & Agricultural Wire, suitable fencing staples and the required strainers, gates and hardware.
The important date is 1 April 2027
If you are specifying, buying or selling creosote-treated fencing in Great Britain, check the current HSE position before the job proceeds. The 2026 decision allows a transition period for non-safety-critical fencing, but that route ends on 1 April 2027.
Sources checked: HSE Decision 2026-002 under the Great Britain Biocidal Products Regulation, HSE’s ministerial decision summary and UK REACH restrictions. This page is product guidance, not legal advice; always check the current HSE decision and product labelling for the project.
