The person specification is the marking scheme. It is published with the advert, it lists essential and desirable criteria, and a shortlister works down it looking for evidence of each one. That is the whole mechanism, and it explains almost everything about what does and does not work in the supporting information box.
The common failure is a well-written personal statement. It reads nicely, it covers the candidate's career in flowing paragraphs, and the evidence for criterion four is buried in the middle of paragraph six where nobody looking for it will find it quickly.
Open the specification in a second window
Before writing anything, list the essential criteria in the order the specification gives them. Then the desirable ones you can honestly claim. That list is your structure. You are not writing an essay about yourself, you are answering a set of questions somebody else wrote.
If a criterion says "experience of audit and quality improvement", the reader needs to find audit and quality improvement, ideally in words close to the ones they are scanning for. Repeating the specification's own vocabulary is not lazy writing here. It is how the evidence gets located.
One claim, one example
"Excellent communication skills" scores nothing. It is an assertion about yourself that any applicant could type, and shortlisters have read it several hundred times.
What scores is a situation. A specific handover you redesigned, a family meeting you led, a complaint you handled and what happened afterwards. The example does not need to be dramatic. It needs to be yours, specific enough that nobody else could have written it, and short.
The useful discipline: for every criterion, write the claim in one line, then the evidence in two or three. If you cannot produce the evidence line, you have found a genuine weakness in the application, which is worth knowing before the closing date rather than after it.
Cover the essential criteria completely, even the boring ones
Candidates skip the criteria they consider obvious. Registration, mandatory training, right to work, basic clinical competencies. These are essential criteria and they carry marks, and a shortlister who cannot find evidence of an essential criterion may score it as absent rather than assume it.
A single line each is fine. They do not need paragraphs. They need to exist.
Respect the word limit, and the format
Trac and NHS Jobs boxes vary in what they accept. Some strip formatting entirely, so bold headings, bullet characters and indentation can arrive as a single undifferentiated block. Write assuming plain text will survive and nothing else will. Short paragraphs and clear opening words to each one do the work that formatting would otherwise do.
Check the character limit before drafting rather than after, because cutting a finished statement by a third is worse work than writing to length.
What not to do
Do not reuse one statement across several vacancies. Different posts publish different specifications, and a statement written for another job announces itself by covering criteria this post did not ask for while missing ones it did.
Do not claim a desirable criterion you cannot evidence. The gain is small and it may come up at interview, where you will be asked to expand on it.
Where this stops being writing
A statement can only present what you have done. If a post asks for two years of experience in a specialty and you have six months, better structure will not close that, and we would rather say so than take the work. What structure does is make sure you are scored on the experience you actually hold, which is a smaller claim than most CV services make and it is the one we can stand behind.
This is guidance on writing an application. It is not careers, employment or immigration advice.