Lewis Hamilton will end his 14-year association with McLaren at the end of the season and switch to Mercedes.
The 27-year-old driver will reportedly sign a three-year deal worth £15 million a year.
According to reports today in several British newspapers, an announcement could come later on Friday.
Hamilton's contract negotiations have been a running saga all season.
More top news
Morning wind and rain in Scotland and western England will move eastwards, leaving brighter weather behind it by late afternoon.
Theresa May will brief her Cabinet on her plans for Brexit before a major speech aimed at helping to break the deadlock in the negotiations
The NHS in England is facing a crisis because fewer people are choosing to enter medicine or remain in the NHS as doctors, the BMA says.