Monarch worst for delays
As usual, there are lies, darned lies, and statistics!
The figures are for the last 3 years. I recall in 2012, when they expanded quickly into the BHX market, to fill a gap left by BMI Baby, they were overstretched capacity wise and leased in a rag tag and bobtail of poor quality carriers which resulted in poor punctuality, and poor customer service on those routes. I'm sure this was a major factor in these poor figures, leading to the Daily Mail story.
Unfortunately being "lazy" journalists, the Mail didn't bother to look behind the figures and establish possible reasons; they don't even seem to have asked Monarch to comment on the figures. Sloppy journalism, especially from papers like the Mail are a reason I don't pay for their daily rags.