Pirelli motorsport director Mario Isola explained why he did not support moves by some teams to bring back the 2018 tyre specification.
However Isola said dropping the thinner-tread 2019 rubber in favour of the thicker tyres, which were used at all bar three races last year, could have jeopardised safety and made the racing worse.
Mario Isola: “So it was not just a request from Pirelli but the FIA analysed their request and said ‘yes, you are right, the evidence that you provided [is] good so you are authorised to do that’.”

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