Madonna, O2 London, gig review: It’s religion and rebellion as her Madgeness reminds us why she is such an enduring talent

“London are you ready?” Madonna launches her four-day stint at London’s O2 to promote her 13th album, Rebel Heart, with plenty of bling and swagger. Entering with a host of gold-clad dancers costumed as Roman soldiers, she’s modestly – for her Madgeness – dressed in black sparkly dress and a cape, which perhaps due to…