Gilbert O’Sullivan’s melodic gems sit in the melancholy shadow behind the flash and confidence of ‘70s pop. Minor-key masterpieces such as his self-doubting debut hit “Nothing Rhymed” or the eternal lament “Alone Again (Naturally)”, which was a global smash for him in 1972, paint this otherwise breezy singer as a poet for the maudlin-minded. His trademark flat cap might suggest Peaky Blinders, but his songs are full of poise and reflection: they’re wry observations on emotional unrest, riddled with sly humour and sung in a voice that’s half-sigh, half-philosophical shrug (“Clair”).