Peter Mandelson helped Morgan McSweeney privilege Labour’s reactionary forces to sustain the PM, says Guardian columnist Owen Jones

Starmer’s chief of staff, who has quit over Mandelson appointment, was accused of presiding over a toxic No 10

If he and his philosophy were to blame for the government’s ills, now it can change tack. There can be no more excuses, says Guardian columnist Polly Toynbee

Those pushing to oust the prime minister are unlikely to be deterred by his right-hand man’s departure

Allies hope aide’s departure can quell anger over Mandelson scandal but others say it leaves PM dangerously exposed

Jacqui Smith defends prime minister following resignation of Morgan McSweeney amid Mandelson scandal

Peter Mandelson helped Morgan McSweeney privilege Labour’s reactionary forces to sustain the PM, says Guardian columnist Owen Jones