Sir Elton John and his ex-wife Renate Blauel have settled a legal case brought after details of the marriage were featured in the singer’s memoir and biopic.Blauel had sued John for allegedly breaching an agreement the pair signed after their divorce in 1988 which, her lawyers said, prevented either of them discussing the marriage or reasons for their separation.She asked for an injunction preventing future disclosures as well as damages and costs estimated at £3m.On Wednesday a representative