Funny, lairy and vulnerable … Leisa Gwenllian as Effi in Effi o Blaenau. Photograph: MetFilm Distribution The one-woman play Iphigenia in Splott was first performed in 2015. Eleven years on, Gary Owen’s reworking of Greek tragedy, transplanted to working-class Splott in Cardiff, has earned its place as a modern classic. It reimagines the mythological heroine Iphigenia as Effie, a young woman filling her days drinking vodka out of a mug in her dressing gown.