The layout of Turn 9 allows drivers to take liberties on the exit if they have carried too much speed – with Nico Rosberg having all four wheels off the circuit there during his Q2 run yesterday.

The FIA has deemed that there is no need to police the turn in terms of track limit rules, though, because there is no time advantage from running wide.

One problem that has emerged, however, is that those drivers who do run wide are pulling debris back on to the track when they cut across the grass on the exit.

In a bid to prevent that happening in the Belgian Grand Prix, the FIA has elected to install a small kerb on the exit – which will force drivers to get back on track before the grass area or risk damaging their car.