Newcastle Falcons agree the signings of Lyon prop Sami Mavinga and Jersey flanker Gary Graham for next season.
England number eight Billy Vunipola returns from injury as Saracens secure a bonus-point win at Newcastle.
Newcastle Falcons will sign back-rower Ryan Burrows from Championship side Yorkshire Carnegie at the end of the season.
Joe Simmonds kicks 11 points in his first Premiership start to help Exeter move into second with victory over Newcastle.
Audio & Video
Near the halfway stage of the 2016-17 season, BBC Sport's Jeremy Guscott assesses the sides vying to be Premiership champions.
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