The photo that offers clues about Mercedes’ F1 troubles

For however much its rivals believe the German car manufacturer is sandbagging, it was clear from observing the W13 on track that it is not in a happy place right now.

The excessive porpoising, lurid oversteer moments and struggles to find consistency through a corner have left it on the back foot.

But while there has been no detailed explanation yet about what its issues are, some late modifications to the car – including the drastic move of cutting away some of its floor…