On her second EP, Bored of the Circus, the London-based singer-songwriter continues refining her craft, pairing lyrics that acutely describe mental illness with music that updates the idea of “the perfect pop song” for the 21st century — although it does so by reaching back into music’s past. The five tracks on Bored of the Circus possesses an out-of-time quality that’s heightened by the contrast between her quivering lead vocal and the hovering choirs behind it.