Chuka Umunna

Umunna left Labour in 2019 amid disagreements over Jeremy Corbyn's leadership, Brexit and the handling of antisemitism. After helping launch the Independent Group, he joined the Liberal Democrats and contested Cities of London and Westminster rather than his former Streatham seat. He finished second to Conservative Nickie Aiken. His departure from Parliament therefore followed both a change of party and a change of constituency, an important qualification to any claim that his old constituents simply rejected a defector.