On 16 October 2026, every electrical engineer in Scotland started working to a different rulebook, and plenty of them have not opened it yet.
Does Amendment 4 to BS 7671 matter to a factory, a distillery or a process plant? Yes. BSI has confirmed that BS 7671:2018+A2:2022+A3:2024 was withdrawn on 15 October 2026, six months after Amendment 4 was published on 15 April 2026 (BSI, April 2026). From now on, new electrical work, alterations and periodic inspections should be designed, installed and certified to A4. If your site has an in-house electrical team that tests and signs off its own work, that team now needs to know what changed, and so do the people you bring into it.
What actually changed in Amendment 4?
BSI lists the headline changes as a new chapter on stationary secondary batteries used to supply installations, a new section on functional earthing and functional equipotential bonding for ICT equipment and systems, a new section on Power over Ethernet, a major revision of Section 710 on medical locations, and closer alignment with IEC and CENELEC documents.
Section 710 mostly concerns hospitals and clinics. The other three land squarely on industrial sites. Batteries now turn up behind the meter on manufacturing sites as UPS systems, as storage paired with rooftop solar, and as a way of trimming peak energy costs. Power over Ethernet feeds IP cameras, access control, wireless access points and an increasing number of sensors across production floors. Functional earthing matters wherever control networks, SCADA and condition monitoring equipment share a building with heavy rotating plant.
For years, much of this sat with the IT contractor or the solar installer. Amendment 4 brings it explicitly into the wiring regulations, which means someone on site has to understand it well enough to inspect it, test it and record the results properly.
Why this lands on the maintenance team
BS 7671 is a British Standard, not a statute. But the legal duty to keep electrical systems safe sits with the employer under the Electricity at Work Regulations 1989, and HSE guidance (HSR25) treats installations that meet BS 7671 as likely to meet the relevant parts of those regulations. In practice, when something goes wrong, the question asked is whether the work met the current edition.
On many sites the multi-skilled or electrical maintenance engineer is the person carrying out alterations, adding circuits for new lines and supporting periodic inspection. In Scottish manufacturing and industrial businesses, that engineer is often also the one dealing with the plant’s newest kit: the battery cabinet, the PoE switch feeding the camera network, the panel PC on the line. Amendment 4 does not add a new legal duty, but it does move the benchmark that engineer is measured against.
The people who know this are being pulled elsewhere
The timing is awkward. The Scottish Government’s Scottish Economic Bulletin (13 October 2026) shows payrolled employees in Energy Production and Supply up 27 percent since the start of 2023, while total payrolled employees in Scotland fell to 2.44 million in August 2026, the lowest level since the start of 2023. The energy sector is growing its headcount while the wider workforce shrinks.
That growth is built on exactly the skills Amendment 4 now asks industrial sites to hold in-house: battery systems, protection, earthing and low-voltage installation work done to a high standard. In March 2026 Rolls-Royce announced it had begun construction of a 43 MW, 86 MWh battery storage facility for Voltaria at Bankside in Falkirk, due online in 2027. It is one of a long list of storage and grid projects across Scotland. Each one needs electrical engineers and technicians, and many of those people currently work in factories.
This was predictable. Scottish Engineering’s skills gap analysis, reported in January 2025, found that electrical technicians faced the most severe shortfall of the 31 key positions it studied, with nearly 150 new recruits needed for every 100 current jobs within three years. That forecast did not include new inward investment. The battery and grid build-out is exactly that kind of investment.
Isn’t the jobs market loosening?
In general terms, yes. The KPMG and REC UK Report on Jobs (published 8 October 2026, September data) showed candidate availability rising for just over three and a half years, with permanent salary growth easing slightly. The Scottish Economic Bulletin puts online vacancies in Scotland 7.1 percent below a year earlier.
A looser market overall is not the same as electrical engineers being easy to find. More applicants for a general maintenance role does not produce more people who can design a battery installation to the new chapter or explain why a control network needs functional earthing separate from protective earthing. Headline availability figures hide the disciplines where supply is still thin, and electrical is the clearest example in Scottish engineering.
Train or hire? The case for doing both, in the right order
Here is where opinions split. One view says that if a role involves certifying electrical work, the current edition should be a condition of the job from day one, and an advert should say “18th Edition, Amendment 4” in black and white. It is a defensible position for a site’s sole electrical authority, the person whose signature goes on the certificates.
For most other electrical and multi-skilled roles, that filter is a mistake in October 2026. Amendment 4 has been the only current edition for less than a week. Many capable, time-served engineers hold the 18th Edition at A2 or A3 and have not yet sat the update. An advert that demands A4 today mainly selects for people who happened to book a course early, and screens out engineers with ten years of fault-finding on live plant who need a few days in a classroom.
The stronger approach is to hire for the hard-to-teach part, real electrical competence, safe isolation habits and experience with the kind of equipment on your site, and to fund the A4 update as part of onboarding. The update is a known, short, priced item. Experience with battery systems, drives and control networks is not something a course delivers.
What a sensible response looks like this quarter
For engineering managers, the first job is an honest audit: who on site signs electrical certificates, which edition they last trained on, and whether the site now has batteries, UPS systems or a PoE network that nobody has formally owned. That picture tells you whether you have a training gap, a hiring gap or both.
The second is to rewrite job descriptions around the actual systems. “18th Edition” on its own tells a candidate very little. “Maintain and test LV distribution, a site battery system and the PoE network for line cameras” tells an experienced engineer exactly what the job is, and lets the right people recognise themselves in it.
For engineers, the message is simpler. If you have completed the A4 update, or you have worked on battery storage, PoE or ICT earthing, put it on your CV in plain words. Over the next year those details will separate electrical engineers who are current from those who are merely qualified.
The bigger signal in a small amendment
Amendment 4 is a modest document with a clear message. The electrical installation on a modern industrial site is no longer just distribution boards, motors and lighting. It includes the batteries, the data network and the devices that hang off it. The engineers who understand all three are the ones Scotland has fewest of, and the energy sector is already paying to secure them. Sites that treat this month’s change as paperwork are likely to meet the gap at their next periodic inspection.
Sources
- BSI, BS 7671:2018+A4:2026, get the latest amendment to the UK’s wiring regulations (April 2026): https://knowledge.bsigroup.com/articles/bs-7671-2018-a4-2026-get-the-latest-amendment-to-the-uks-wiring-regulations
- Scottish Government, Scottish Economic Bulletin: October 2026 (13 October 2026): https://www.gov.scot/publications/scottish-economic-bulletin-october-2026/pages/5/
- Personnel Today, KPMG and REC Report on Jobs, September 2026 data (8 October 2026): https://www.personneltoday.com/hr/jobs-market-back-to-life-rec-kpmg-september-2026/
- Aberdeen and Grampian Chamber of Commerce, report on Scottish Engineering’s skills gap analysis (January 2025): https://www.agcc.co.uk/news-article/scotland-facing-economic-disaster-caused-by-engineering-skills-shortage-report-finds
- Rolls-Royce, Rolls-Royce and Voltaria to build a 43 MW large-scale battery storage facility in Scotland (31 March 2026): https://www.rolls-royce.com/media/press-releases/2026/31-03-2026-rr-and-voltaria-to-build-a-43-mw-large-scale-battery-storage-facility-in-scotland.aspx
