• Mercedes chief attacks backlash over engine loophole

• Vote on legality of power plant ‘a storm in a teacup’

Toto Wolff, the Mercedes principal, has snapped back at “utter bullshit” about a potential fuel problem a day after the FIA proposed a mid-season rule change over the team’s controversial engine.

It was announced on Wednesday that a vote will take place over whether a regulation change should be implemented from August onwards over the legality of Mercedes’ engine, after they were adjudged to have found a loophole that allowed them to deliver a higher limit when their engine is at operating temperature.