Hospitals across the country are grappling with staff absences and an increase in demand, while ambulance handover delays and bed blocking are adding strain on services.
NHS England data shows 755 people arrived at Sheffield Teaching Hospitals NHS Foundation Trust A&E by ambulance in the week to January 9.
Of them, 238 (32 per cent) waited more than 30 minutes before being handed over to A&E staff, with 80 (11 per cent) waiting more than an hour.
However, this was down from 35 per cent waiting over half an hour the week before.
The NHS has a target of 15 minutes for ambulance handovers, but only delays longer than 30 minutes are recorded.
The data also shows an average of 577 staff were off sick because they had Covid-19 or were self-isolating due to the virus each day in the week to January 9 – accounting for 69% of absences.
This was up from the week before when 64 per cent of staff were off for Covid-related reasons.
He said: “Despite this, once again, NHS staff pulled out all the stops to keep services going for patients.
“But staff aren’t machines and with the number of Covid absences almost doubling over the last fortnight and frontline NHS colleagues determined to get back to providing even more routine treatments, it is vital that the public plays their part to help the NHS by getting your booster vaccine.”
Separate figures show bed blocking was also causing issues at trusts across England last week, with 72 per cent of patients deemed fit to leave hospital on January 9 – the latest date for which data is available – failing to be discharged.
At Sheffield Teaching Hospitals Trust, 426 patients were eligible for discharge on January 9, but just 74 (17 per cent) left hospital.
Meanwhile, waiting lists for routine treatments are also at an all-time high nationally, with six million people waiting for non-urgent elective operations or treatment at the end of November, up from 5.98 million the month before.
NHS England figures show 62,845 patients at Sheffield Teaching Hospitals Trust were on the waiting list at the end of the month – though this was 329 fewer than the month before.
Shadow health secretary Wes Streeting said the NHS was unprepared for the pandemic and had no “spare capacity” when the Omicron variant hit.
He said: “Now patients are paying the price, waiting months and even years for treatment, often in pain, distress and discomfort.”
Siva Anandaciva, chief analyst at the King’s Fund, said long waits for care were becoming increasingly common.
He said: “We must remember these are not just big numbers – they are people living with pain and anxiety while they wait for months and, in some cases, more than two years for treatment.”