Sports Mole rounds up all of the latest news regarding Formula 1 on Saturday, December 19

News from Formula 1:

Mercedes principal and CEO Toto Wolff extends role for three years
INEOS will become a one-third shareholder as part of a team re-structuring deal. Read more.

Toto Wolff: 'No special date for Lewis Hamilton contract'
The seven-time world champion's current contract runs out at the end of this month. Read more.

Sergio Perez joins Red Bull for 2021 season
The 30-year-old Mexican impressed for Racing Point last season, claiming victory at the Sakhir Grand Prix. Read more.