The current Formula 1 world championship standings can broadly be split into three sections. Now that Mercedes have made a breakthrough with their car, there’s a distinct top four. Mercedes’ run of three wins in four races has closed the gap on Red Bull to 143 points, and it could be significantly smaller by the end of the season. They started the year battling Aston Martin, but they’ve now opened up a near-200-point cushion on the Silverstone outfit. Aston head up a group of three midfield teams also featuring RB and Haas. Lawrence Stroll’s squad look almost certain to finish fifth in the sta…