Labour has won the Holborn and St Pancras by-election, seeing off a challenge from Green Party leader Zack Polanski. Camden council leader Sagal Abdi-Wali held the north London seat for Labour but the party's majority was slashed. The by-election, which was triggered after former Prime Minister Sir Keir Starmer stood down as an MP, had been seen as a key test of whether Labour under Andy Burnham can win over voters who have switched to the Greens.
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