Sir Keir Starmer's leadership has been flung into doubt, with the resignation of his closest aide.
The UK Prime Minister's chief of staff Morgan McSweeney's quit - taking responsibility for advising Starmer to appoint Peter Mandelson as US ambassador.
Mandelson's being investigated for claims he'd passed sensitive information to sex offender Jeffrey Epstein.
UK correspondent Mike Pearse explained further.
LISTEN ABOVE

Andy England: Darfield High School Principal on schools pushing for exemptions to OIA requests
05:26

The Huddle: Do we think Luxon's safe in his seat?
10:21

Barry Soper: Newstalk ZB senior political correspondent on the conclusion of the Luxon saga
05:19