Concerns were raised last night after reports that queues of ambulances were waiting outside the University Hospital of Wales in Cardiff for hours to transfer patients.
A member of the public contacted ITV Cymru Wales claiming around 14 vehicles were outside A&E with patients inside.
Today Cardiff & The Vale University Health Board has denied that claim.
The board says at it's busiest point there were several ambulances outside and that was for less than an hour's wait.
A spokesman told ITV Cymru Wales 91 per cent of patients were seen within four hours and nobody waited for more than 12 hours.
The board says it is coping well during the busiest period of the year and it has not had to cancel any elective operations and wishes to reassure the public and thank staff for managing the demands on them.
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