The Green Party have won their very first by-election. Westminster Insider Host Sascha O’Sullivan goes inside the Greens’ effort to win the seat, and finds out how the battle for this seat will inform the three-way fights between the Greens, Labour and Reform UK.

She speaks to Hannah Spencer on the election trail – and on the night itself.

And she speaks to the other candidates, Angeliki Stogia for Labour and Matt Goodwin for Reform to find out what worked – and what didn’t.

As Labour licks its wounds, director of the Labour Growth Group Mark McVitie talks Sascha through how the party machine have been thinking about the Greens and what needs to change.

Pollster and director of More in Common Luke Tryl examines what the curious combination of voters can tell us about the future fights Labour will shake out.

And deputy political editor of the Spectator James Heale explains why Reform’s Matt Goodwin didn’t win here in Gorton and Denton.

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