Figures show 753,293 treatments to be completed, down 0.2% - but still the second highest on record.
The figures for November show that 67.3% of patients in all NHS emergency departments spent less than four hours there.
The worst performance against the target of seeing 95% of A&E patients within four hours was at Glan Clwyd Hospital, Denbighshire, where it was 48.6%.
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