NHS Has ‘Zero Tolerance’ for 24-Hour A&E Waits – But Doesn’t Validate How Many Happen

More than 500,000 A&E attendances in England involved waits exceeding 24 hours during 2025, according to National Audit Office estimates – yet NHS England does not validate or routinely use the data for national reporting.

The NAO estimates another 1.2 million attendances involved waits of between 12 and 24 hours.

NHS England told the watchdog it has concerns about the quality of the Emergency Care Data Set used to produce the figures and does not rely on them for routine national reporting.

That creates an uncomfortable gap.

NHS England’s own documents describe waits exceeding 24 hours as a “red-line safety standard” requiring “zero tolerance”.

It does not have a validated national statistic showing how often that red line is crossed.

The consequences extend beyond inconvenience

Long waits in emergency departments are associated with worse outcomes.

Analysis cited by the NAO found that patients waiting more than 12 hours faced roughly double the risk of dying within 30 days compared with those waiting around two hours.

Pressure also extends beyond A&E departments.

In May 2026, an average of 2,241 patients a day were waiting in A&E corridors, with another 669 patients on ward corridors.

One of the underlying problems is getting patients out of hospital once they are medically ready to leave.

The NAO estimates delayed discharges cost approximately £2 billion between August 2025 and April 2026.

Hospitals cannot efficiently admit patients from emergency departments when beds remain occupied by people waiting for care elsewhere.

A red line nobody properly counts

Nobody needs another statistic to establish that England’s emergency departments are under severe pressure.

The more revealing finding is how that pressure is measured.

If a 24-hour A&E wait is sufficiently serious to warrant a zero-tolerance standard, knowing how frequently it happens should be one of the most basic measures of whether that standard means anything.

The National Audit Office can estimate that more than half a million attendances crossed the line.

NHS England does not validate the figure for routine national reporting.

A red line is considerably less useful when nobody officially counts how often it is crossed.