Scheme document
Which issue of NHSS 12D is current, and how to tell if your copy is out of date
Issue 5 (July 2025) replaced Issue 4. What changed, where the only authoritative copy lives, and why a search engine result can be the wrong one.
Guides
Short guides on NHSS 12D
Factual pages you can read without buying anything. Each one is dated, says when we last checked it against the source, and links to the published document rather than copying it.
Buying TM
How to check a contractor is 12D registered on UKAS CertCheck
Where the register moved to in 2022, what the certificate scope has to say, the two card checkers, and the questions a client is told to ask.
Training
The Gate Person requirement and the two dates in circulation
Added in Issue 5. Why one document says 1 September 2025 and another says 1 October 2025, and what the role covers in plain words.
Reference
Sources and versions
Every document the question bank is built from: title, publisher, edition, date, where it is hosted and when we last checked it.