The prime minister’s challenge will be to battle-test the rookies before the veterans eventually step back, says former Nominated Member of Parliament Nicholas Fang.

Mr K Shanmugam is appointed senior minister while labour chief Ng Chee Meng rejoins the Cabinet and Ms Jasmin Lau is named acting manpower minister.

Coordinating Minister for National Security K Shanmugam is promoted to senior minister, among other key changes.