Brown is said to be driven by moral anger but insiders suggest he may feel guilty for bringing Peter Mandelson back into government

Before Gordon Brown sent a draft of his 6 February comment piece on the Jeffrey Epstein scandal to the Guardian for publication, he asked friends whether he had gone too far.

The former prime minister had written that he found it “hard to find words to express my revulsion at what has been uncovered about Epstein and his impact on our politics” and the “time is overdue to let in the light”.