TMDb/Saturday Night Live UK TV SNL UK debuts with a political cold open: PM Starmer navigates a "special situationship" with the U.S. in a satirical sketch. April 15, 2026 AceShowbiz - The debut episode of Saturday Night Live U.K. aired live from London on March 21, marking the British adaptation's first broadcast with the classic opening line, "Live from London, it's Saturday night!" While expected, the phrase still caught some viewers by surprise as it highlights the show's connection to its American counterpart.