Prime Minister Boris Johnson is suffering lagging popularity with Britons. The latest voting intention figures from the YouGov pollster show the center-left Labour Party with a four-point lead over Johnson’s Conservative Party. It’s a notable increase from polls taken in January and the later part of 2020. But it’s not all good news for Labour.

Labour leader Keir Starmer leads on the “who would make the best Prime Minister” question, with more than a third of Britons (41%) preferring him to Johnson. But Starmer shouldn’t be patting himself on the back: 34% of voters remain undecided on this important leadership question. That speaks to Starmer’s key challenge: how to maintain and build on his lead in the run up to an expected 2024 election. While Starmer obviously has time on his side, several obstacles stand in the way of his success.