Thumbs up emoji for Southwark Playhouse, commendably quick in October to welcome distanced audiences back with the musical The Last Five Years and subsequently adept at streaming experimental musical work. The latest example was being developed at the venue in March, and was then completed wholly online. Apt, as Public Domain is about social media, and entirely composed of words brazenly filched from various platforms – notably YouTube, Twitter and Instagram. It might almost be called The Last 10 Years. The show’s creators and performers – Francesca Forristal (book, lyrics) and Jordan Paul Clarke (music/lyrics) – cite two points of reference: Black Mirror and The Social Dilemma, the latter being the recent US drama-documentary about the adverse mental consequences, particularly on the young, of this ever-more-engulfing means of communication. Some might further detect the influence of London Road (2011), the hit verbatim musical about the Ipswich serial murders of 2006 that converted often banal conversational snippets into arresting song. That show’s inspired stroke was to keep scratching the surface of inarticulate sentences, excavating more complex resonances, by turns reaffirming the sentiments and undermining them. That alchemical creative process is apparent here from the start, when the duo intone, in a soft yet vaguely sinister loop, “We came here for our friends then we got to know the friends of our friends”; personal testament elides with corporate statement, becomes a vacant repeated mantra.