F1 Bahrain pre-season testing live commentary and updates - day 6

And of course the other hot-button topic is that of how the race starts will work out. With the elimination of the MGU-H from the power units for this season, turbo lag is a thing again so the drivers need extra time to rev their engines before letting rip.

Ferrari, it emerged, had seen this coming before the others and established a workaround. Then when its rivals realised the potential issues and began to push for changes to the procedure, Ferrari naturally said nay. But now sense has prevailed and an amended start procedure is being trialled at the end of running every day this week.

Some more light reading for you with matters arising from the second test. There's been much excitement about Ferrari's swivelling rear wing, and Lewis Hamilton's launch off the line during a start simulation, but Lewis's average pace during a race sim on the day didn't set the world alight (caveat: this is testing, so he won't have been pushing).

The general trend of thinking is that Mercedes will be in the driving seat once everybody has stopped sandbagging.

And of course the competitors are well into I-told-you-so mode about the new regs and the shortcomings of running a near 50:50 ratio of internal combustion and electrical power. There are discussions surrounding the idea of limiting the amount of deployment so it lasts longer.