Labour figures including Ed Miliband take part in early campaigning in the Holborn and St Pancras by-election, which is triggered by Sir Keir Starmer standing down. The contests are described as among the first battles ahead of the vote in the London seat.

Labour MPs from across the city join local activists on the ground as they campaign for Labour’s candidate, Zack Polanski. Coverage focuses on party mobilisation and the effort to build momentum in the constituency following Starmer’s decision to step aside. Other details, such as specific policy differences or campaign events, are not included in the information provided here.

Overall, both sources point to the same core facts: the by-election is in Holborn and St Pancras, triggered by Starmer’s withdrawal, and Ed Miliband is among those campaigning early, with Labour mounting a challenge involving Zack Polanski.