More than three decades after their breakthrough, 4 Non Blondes arrive at London’s O2 Shepherd’s Bush Empire not to relive the past, but to redefine themselves in the present. Supported by the excellent Lucia & The Best Boys, the reunited San Francisco outfit make it abundantly clear that this tour is not a nostalgia exercise. Instead, it is a bold statement of who they are now — and whether the audience is willing to come with them.