sentences:  The series' first four seasons featured an entirely British writing staff, including Iannucci, Blackwell, Roche, Sean Gray, Will Smith, Roger Drew, Ian Martin, Andy Riley, Kevin Cecil, David Quantick, Georgia Pritchett and Jesse Armstrong, among others, many of whom had previously worked with Iannucci on "The Thick of It".Series creator Armando Iannucci departed as showrunner following the fourth season's end of production.Iannucci stated that his continuing busy schedule, as well as the challenge of maintaining his family life while switching between Baltimore and London, would not allow him to "[dedicate] one hundred percent" as head of the show, and he had chosen to "fire" himself as a result.