UK politics: Starmer facing Reform UK byelection challenge as Mike Amesbury quits as MP - as it happened - Mike Amesbury to stand down as MP over assault conviction - Mike Amesbury to quit as MP after punching man in street - triggering by-election - Labour MP Mike Amesbury to stand down over assault conviction - Mike Amesbury resigns as MP, triggering byelection - By-election nightmare for Keir Starmer as sucker punch ex-Labour MP Mike Amesbury quits - Mike Amesbury quits as MP triggering crunch by-election for Keir Starmer - 'I could have been killed': Man attacked by Mike Amesbury speaks out after MP walks free from prison - MP Mike Amesbury's jail term suspended on appeal - 'Two-tier justice' claims as Mike Amesbury dodges prison while others jailed for posts