Gig Review: Vitamin String Quartet at The Barbican ★★★★★

There is no such thing as the Vitamin String Quartet. They're an ever-changing line-up of musicians who have found an excellent schtick; modern songs played like classical music. Somehow they've parlayed that into over 300 albums, covering thousands of artists, and dominating the soundtrack of Bridgerton. The concert is titled "The Music of Billie Eilish, Bridgerton, and Beyond" - it's all…