UK workplace shifts: endometriosis, night shifts and the cost of silence

The UK workplace is quietly fracturing along two fault lines—one biological, the other temporal. This weekend, an inquiry into endometriosis has laid bare how chronic illness is pushing women out of careers they can no longer sustain, while a separate health crisis among night workers reveals a workforce operating at odds with its own physiology. Neither issue is new, but the scale of their economic and human cost is only now coming into focus.

The careers lost to endometriosis

For years, endometriosis has been treated as a private struggle, its symptoms—debilitating pain, fatigue, and infertility—dismissed as "bad periods" or stress. Now, three women have told the BBC how the condition has derailed their professional lives. One left a senior role in finance after her employer refused to accommodate flexible working during flare-ups. Another, a teacher, was signed off for months before resigning when her school insisted she return to full-time hours. A third, working in healthcare, described being passed over for promotion after taking sick leave for surgery.

Their stories are not outliers. Endometriosis UK estimates that the condition costs the economy £8.2bn annually in lost productivity and healthcare expenses. Yet workplace policies remain largely silent on the issue. The current inquiry, led by the All-Party Parliamentary Group on Endometriosis, is the first to examine how employers can better support affected employees. Early evidence suggests a pattern of systemic failure: managers untrained in recognising symptoms, HR policies that treat chronic illness as a disciplinary matter, and a culture of presenteeism that punishes those who cannot perform through pain.

The irony is stark. Women with endometriosis are often high achievers—studies show they are more likely to hold degrees and work in professional roles—but their careers stall precisely when they should be advancing. The inquiry’s interim report, due next month, is expected to recommend mandatory workplace adjustments, including flexible hours and remote working options. Whether employers will act remains an open question.

Night shifts: the invisible workforce

Meanwhile, another workplace crisis is unfolding in the dark. More than three million people in the UK work night shifts, a number that has grown by 20% since 2010. The health risks are well-documented: disrupted circadian rhythms, increased risk of cardiovascular disease, diabetes, and depression. Yet protections for night workers remain minimal.

A BBC investigation this week highlighted the human cost. One nurse, working 12-hour night shifts in an understaffed hospital, described falling asleep at the wheel on her drive home. A warehouse worker in the Midlands said his employer had refused to rotate shifts, leaving him chronically exhausted. Another, a lorry driver, admitted to using caffeine pills to stay awake during overnight routes.

The UK lags behind much of Europe in regulating night work. The EU’s Working Time Directive limits night shifts to eight hours, with mandatory health assessments for workers. In the UK, the limit is 13 hours, and health checks are only required for those deemed "at risk"—a category so narrowly defined that most workers fall through the cracks. The Trades Union Congress (TUC) has called for reform, arguing that the current system prioritises productivity over safety. "Night workers are the backbone of our economy," said a TUC spokesperson. "They deserve the same protections as everyone else."

Employers, however, warn that stricter rules could disrupt industries reliant on 24-hour operations, from healthcare to logistics. The government has so far resisted calls for change, citing "flexibility" as a key advantage of the UK’s post-Brexit labour market. But as the number of night workers continues to rise, so too does the evidence of their health toll. A study published last month in The Lancet found that night shift workers have a 40% higher risk of developing type 2 diabetes, even after accounting for lifestyle factors.

The cost of silence

What links these two crises is a broader failure to adapt workplaces to the realities of human bodies. Endometriosis and night shifts are treated as personal problems, not systemic ones. Women with chronic illness are expected to "manage" their symptoms, while night workers are told to "adjust" their sleep patterns. The result is a workforce that is sicker, more exhausted, and less productive than it should be.

The economic case for change is compelling. The £8.2bn annual cost of endometriosis is just one part of the picture. The health impact of night shifts could cost the NHS billions in the coming decades, as workers develop chronic conditions linked to disrupted sleep. Yet the political will to act remains elusive. The current government has focused on "workplace flexibility" as a tool for economic growth, but its definition of flexibility rarely includes the needs of those who cannot conform to traditional working patterns.

For now, the burden falls on individuals. Women with endometriosis are left to navigate a system that treats their illness as an inconvenience. Night workers are told to "power through" fatigue. The inquiry into endometriosis and the growing body of research on night shifts may force a reckoning. But until then, the UK’s workplaces will continue to demand more than its workers can safely give.