Aston Martin need a driver to replace Sebastian Vettel – and so, with no glaringly obvious contender, who will they pick?

Vettel has announced his retirement just at a time when Aston Martin were in talks with the German to extend his stay to a third year in 2023.

Team principal Mike Krack had said recently there was no “plan B” if the discussions with Vettel resulted in a parting of the ways. Now, that plan B is very much required.

So, to whom will the Silverstone-based team turn to accompany their owner’s son, Lance Stroll, in the driver line-up?