A vacant post can appear as an underspend. The clinical work attached to it rarely disappears.
It may be redistributed among existing staff, deferred into a waiting list, transferred to another service or purchased later through locums and outsourcing. The financial ledger may record a saving while the clinical system records longer waits, reduced training capacity and growing pressure on the remaining workforce.
Recent evidence illustrates why workforce control and workforce planning should not be treated as the same process.
The Royal College of Radiologists says recruitment freezes in radiology and cancer services have doubled over the past year. Its latest correspondence identifies delayed scan reporting, inability to provide some cancer treatments, rising outsourcing expenditure and reduced capacity to accept new training posts.
In Northern Ireland, the Royal College of Psychiatrists reports that 32% of senior psychiatrist posts are vacant and annual psychiatry locum expenditure exceeds £11 million. These figures do not prove that every substantive vacancy could immediately replace a locum, but they show why vacancy savings and temporary-staff expenditure must be examined together.
The GMC’s obstetrics and gynaecology analysis adds another dimension. Doctors in training reported higher burnout risk, more sleep deprivation and greater hesitation about escalating patients than respondents across specialties overall. The survey does not measure patient safety, but it provides a warning about the working conditions within which care and training are delivered.
A credible workforce decision should pass five tests.
1. Define what the vacancy represents
A funded vacancy, an unfunded role, a deliberately frozen post and a post that has repeatedly failed to recruit are not interchangeable.
Boards should know why a post is empty, how long it has been vacant and whether the underlying work is continuing. Without that distinction, a recruitment problem can be mislabelled as reduced workforce need.
The analysis should also identify the grade and capability required. Some services need additional doctors in training; others need experienced SAS, specialist or consultant-level decision-makers. Increasing one part of the workforce does not automatically replace another.
2. Account for displaced work and cost
The effect of a vacancy should be followed across the pathway. Relevant measures may include waiting time, outsourced reporting or treatment, locum expenditure, additional sessions, cancelled activity and work transferred to neighbouring services.
Unrecorded redistribution also matters. When existing clinicians absorb the work through longer days, missed development time or repeated additional duties, the apparent saving is being subsidised by the workforce.
3. Assess clinical and escalation risk
A service may retain enough people to staff a rota while losing the experience required for timely decisions, supervision and escalation.
Risk assessment should therefore examine the skill mix available throughout the operating period, including nights and weekends. It should ask whether staff can obtain senior advice, whether concerns are welcomed and whether clinical responsibility is matched by authority.
Burnout and reluctance to escalate should be treated as operational warning signals, while recognising that survey findings alone do not establish that harm has occurred.
4. Protect the workforce pipeline
Training capacity depends on available trainers, clinical exposure, supervision and time. Recruitment freezes can prevent departments from accepting funded training posts or supporting doctors already seeking progression.
SAS doctors frequently contribute to teaching and supervision. That work should be visible in job plans and workforce models. Services should also consider whether stable SAS and specialist posts could retain experienced doctors whose contribution is currently hidden within temporary or locally titled roles.
5. Require a time-limited, reviewable decision
There may be circumstances in which a temporary recruitment restriction is necessary. It should have a defined scope, responsible executive, clinical risk assessment and review date.
The review should consider patient outcomes, waiting lists, temporary staffing, staff experience, training and equality effects. SAS representation is particularly important where a decision changes clinical responsibility or assumes that experienced work can be redistributed without consequence.
The emerging NHS Wales workforce strategy offers a useful principle: workforce planning should be connected with service design, finance, quality, education and future models of care. Looking at staffing numbers in isolation cannot provide that assurance.
An unfilled post is not evidence that the work is unnecessary. The practical question is where the work has gone, who is carrying the risk and whether the arrangement remains sustainable.
Evidence sources
Royal College of Radiologists — recruitment-freeze update: https://www.rcr.ac.uk/news-policy/latest-updates/rcr-calls-for-urgent-government-intervention-on-recruitment-freezes/
Royal College of Psychiatrists in Northern Ireland — workforce evidence: https://www.rcpsych.ac.uk/news-and-features/latest-news/detail/2026/11/06/mental-health-champion-cites-rcpsych-in-ni-s-workforce-concerns-at-public-accounts-committee
General Medical Council — obstetrics and gynaecology training analysis: https://www.gmc-uk.org/news/news-archive/doctors-training-in-maternity-services-face-higher-workloads-burnout-and-barriers-to-speaking-up
Welsh Parliament — NHS Wales workforce statement: https://record.senedd.wales/Plenary/16420?lang=en-GB
RCP Cymru Wales — workforce-strategy response: https://rcp.ac.uk/news-and-media/news-and-opinion/rcp-cymru-wales-welcomes-plans-for-long-term-nhs-wales-workforce-strategy/