Adam Cairns, the Chief Executive of Cardiff and Vale University Health Board, which runs the University Hospital of Wales, has told BBC Radio 4's World at One programme that 12 patients have died on the cardiac surgery waiting list over the last 15 months.
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Rain, heavy at times, will quickly clear eastwards this evening to leave dry conditions for a time.
A very unsettled day with frequent outbreaks of persistent, occasionally heavy rain, especially in the south and over hills.
Protesters are set to march through Cardiff city centre today to campaign against local budget cuts to the arts.