Libya civil war: Egyptian air strikes on Isis will only impede UN's work to bring about a peaceful resolution

The chaos in Libya has grown steadily since the dictator Muammar Gaddafi was overthrown (with the significant help of Nato) more than three years ago. But it has taken yet another atrocity by Isis – this time the apparent beheading of 21 Egyptian Copts – to refocus the West’s attention on the anarchy in a country 300 miles south of Sicily.