Bobby Vylan of Bob Vylan performing at Glastonbury on SaturdayThe BBC has announced a change in its guidelines in light of the controversy surrounding this year’s Glastonbury broadcast.Over the weekend, punk rap duo Bob Vylan made headlines when, during their Glastonbury set, they led the crowd in a chant of “death to the IDF”, referring to Israel’s army, which was broadcast live on BBC iPlayer.Shortly afterwards, the band’s conduct was slammed by both the BBC and Glastonbury’s organisers, while