The Welsh Ambulance Service has confirmed it experienced delays last night in handing over patients to the Princess of Wales Hospital, near Bridgend, which "caused difficulties and challenges" in the service's ability to respond to 999 calls.
The statement was released following reports that up to 14 ambulances were seen queuing outside the hospital building on Tuesday night - a number the Cardiff and Vale University Board say is exaggerated.
A Welsh Ambulance Service spokesperson said: "We can confirm we did experience handover delays at the University Hospital of Wales in Cardiff yesterday evening which caused difficulties and challenges not only for our staff, but also in our ability to respond to 999 calls in the community.
"We are working with our colleagues in Cardiff and the Vale Health Board to minimise the delays.”
The widow of a man who died after waiting for an ambulance for 50 minutes after developing chest pains has said she is grateful for the "thorough investigation" into his death.
Speaking after a coroner said it was “unacceptable” for ambulance delays to cause the potential loss of someone’s life, Fred Pring's widow said:
"Firstly I am grateful to the Coroner for conducting such a thorough investigation into the circumstances surrounding my husband’s death.
"It is a lasting sadness that it was only after he had died that he was elevated to the highest response category".
“I sincerely hope that my husband’s death will lead to improvements in the way the Welsh Ambulance Trust and the hospitals manage their services especially in respect of the handovers of patients to A and E departments".
The Welsh Ambulance Trust and Betsi Cadwaladr University Health Board have expressed their "deep regret" that an ambulance was not sent to Fred Pring in a "more timely manner".
A joint statement said:
Standing outside the inquest, Joyce Pring said she was glad her husband's death had received such media attention because the feels it is "such an important issue".
She said she had been "shocked" at some of the revelations during this inquest, and says to this day she has "no idea" what she could have said to the ambulance call handlers to elevate it from a category 2 emergency to category 1, the highest emergency.
She said she hoped changes made following this inquest would stop others going through her ordeal.
The coroner said:
He also criticised the current system of giving ambulance crews rest breaks that mean them returning back to their base because it "may result in an unacceptable diminution in available resources".
He also said the current practices in place for the handover of patients at A&E departments "far too often results in wholly unacceptable delayed with patients being kept waiting for long periods in ambulances and ambulance resources consequently being unavailable for allocation to other calls".
Ending the inquest with a narrative conclusion, the coroner said if an ambulance had been sent sooner - after Mrs Pring's first call - it was "probable" that Fred Pring would have survived long enough to receive medical attention at hospital.
He said it was "unacceptable" for ambulance delays to cause the potential loss of one life, and warned that other lives would also be at risk if action was not taken to improve matters.
A Welsh Ambulance Service manager has told an inquest she held an investigation after Fred Pring's death, which concluded that there were no ambulances available to go to his aid.
Jill Plemming said: "Between 0109 hours and 0142 hours there were no resources available to this patient. The reason for this was the significant delays in transferring patients both to Wrexham Maelor and Glan Clwyd hospitals."
She added the delays were further impacted by the urgent requirement to give crews 'non-disturbable' breaks after five hours of duty.
An accumulation of these breaks also had a knock-on effect on resources available at that time, Ms Plemming said.
The manager of Welsh Ambulance Service's call centre has given evidence at the inquest of a man who died after waiting nearly an hour for an ambulance arrive.
Jill Plemming said an investigation found call handlers made minor errors when dealing with four emergency calls from 74-year-old Fred Pring's wife but they complied with protocols.
Yesterday Mrs Pring told the court she believed the final call handler showed "a total lack of compassion" when she rang to report her husband had died.
Ms Plemming said the call handler was found to have "a professional tone and showed compassion for the caller's feelings."
The inquest has heard that one ambulance, which would have been allocated Fred Pring's emergency that night, was stuck at Wrexham Maelor Hospital waiting to transfer a patient for almost five hours - 287 minutes to be exact.
Coroner John Gittins told manager Ms Plemming that is "a very long time" to wait to transfer a patient.
She replied: "Yes, it is."
When he asked if there was a target patient transfer time, she told him it was 15 minutes.
Mr Gittins: "So, in a nutshell, six ambulances waiting to transfer patients at Wrexham Maelor, three ambulances waiting to transfer patients at Glan Clwyd. All experiencing delays significantly longer than the 15 minute target time?"
Ms Plemming: "Yes."