Insiders say UK national security adviser avoids limelight, but it found the ‘calm operator’ this week

In the topsy-turvy world in which Keir Starmer and his aides operate, the US putting the onus on Russia to agree to a truce with Ukraine marked a significant victory.

The proposed 30-day ceasefire between Russia and Ukraine is the culmination of two weeks of high-wire negotiations involving Ukraine, the US, UK, France and Germany.