What’s gone wrong with Mercedes and can they recover?

Lewis Hamilton’s Mercedes team are in the midst of a mini crisis following their underwhelming start to the new Formula One season. The Silver Arrows have dominated the sport since 2014 – carrying Hamilton to six world championships and winning an unprecedented eight constructors’ titles in succession. But Hamilton and team-mate George Russell have all but written off their aspirations unless Mercedes can radically improve its underperforming car. Here, the PA news agency dissects the big questions facing F1’s all-conquering team.