Labour Revolt: The 15 MPs Who Voted for Mandelson Investigation

The 15 Labour MPs Who Rebelled Against Keir Starmer

The 15 MPs Who Voted for Mandelson Investigation In a significant challenge to Sir Keir Starmer’s authority, 15 Labour MPs defied a three-line whip to vote in favour of a Conservative-led motion to investigate the Prime Minister’s handling of Lord Mandelson’s appointment as UK Ambassador to the US. The vote, held on April 28, 2026, sought to refer Starmer to the Privileges Committee over allegations he misled Parliament regarding the vetting process, which initially flagged Mandelson’s past ties to Jeffrey Epstein.

The 15 MPs Who Voted for Mandelson Investigation, predominantly from the party’s left, argued that “sunlight is the best disinfectant” and that restoring public trust required a full, independent inquiry.

The full list of Labour MPs who voted for the investigation is the following:

1. Apsana Begum

2. Richard Burgon

3. Ian Byrne

4. Mary Kelly Foy

5. Imran Hussain

6. Brian Leishman

7. Emma Lewell

8. Rebecca Long-Bailey

9. Andy McDonald

10. John McDonnell

11. Grahame Morris

12. Luke Myer

13. Kate Osborne

14. Cat Smith

15. Nadia Whittome