Polanski’s final pitch in Holborn by-election: I’ll keep Burnham honest

LONDON — Zack Polanski promised to smash Britain’s two-party political system — but his campaign for a U.K. parliamentary seat has leaned heavily on the idea that he can keep the existing prime minister honest. POLITICO analysis of the online battleground in the Holborn and St. Pancras by-election – which takes place Thursday — shows the Green leader has been pitching himself as a protest vote for Labour-backing constituents in the London seat, which has been held by Labour since its creation in 1983. The party has spent nearly £5,000 pushing ads on Meta’s platforms, which include Facebook and Instagram, promising that a Green win would help “keep the government in check.