Keir Starmer is facing the most serious political crisis of his leadership as the Mandelson scandal sends shockwaves through Downing Street. Senior figures are resigning, Labour MPs are restless, and Scottish Labour leader Anas Sarwar’s dramatic intervention has exposed deep fractures inside the party.

In this episode of Whitehall Sources, Calum Macdonald and Jo Tanner are joined by former Downing Street Director of Communications James Lyons to break down:

Why Morgan McSweeney and Tim Allen’s resignations matter

The growing fallout from the Mandelson files

How the Sarwar speech changed the political weather

Whether Starmer ends the week stronger — or just surviving

Why this scandal is cutting through with voters in a way others don’t

What this means for upcoming elections and Labour’s future

Is this Westminster chaos — or a moment that could reshape British politics?

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