Today marks the twelfth successive month where ambulance response times targets have been missed.
The Welsh Government's target is for 65% of ambulances to respond to Category A (immediately life-threatening) calls within 8 minutes, yet figures for May show that only 62.5% of ambulances arrived within that time.
Kirsty Williams, Leader of the Welsh Liberal Democrats, commented:
"It is appalling that this very important all-Wales target has not been met once in a year. Targets here in Wales are already 10% behind those in England and Scotland, yet still Wales is missing these unambitious targets.
"It's good to see that there has been improvement in performance when compared to the previous month. However the figures were so bad then, that quite frankly, it was unthinkable that they could get much worse.
"Whether it is ambulances, A&E waiting times, or cancer waiting times, targets in Wales are being consistently missed. The fact is that the Welsh Labour Government has catastrophically mismanaged our NHS and it is the people of Wales that is paying the price for Labour's failure.
"We are seeing both frontline and management staff striving to ensure we have a better ambulance service, but the sad fact remains that the Welsh Labour Government is thwarting any progress."