Vunipola boost for England
Vunipola boost for EnglandSHARE
Vunipola, 26, missed the first two matches of the competition through injury but played 70 minutes for Saracens at the weekend.
His brother Billy Vunipola (Saracens) will join up with England on Tuesday for a medical review having also missed the opening matches because of injury.
Bath wing Anthony Watson is now fit and is named in the 28 following his hamstring strain, while Leicester Tigers forward Mike Williams is also included.
England have won their opening two matches beating France and Wales and head into the game unbeaten in their last 16 matches.
Forwards: Jack Clifford (Harlequins), Dan Cole (Leicester Tigers), Charlie Ewels (Bath), Jamie George (Saracens), Teimana Harrison (Northampton Saints), Dylan Hartley (Northampton Saints), James Haskell (Wasps), Nathan Hughes (Wasps), Maro Itoje (Saracens), Joe Launchbury (Wasps), Courtney Lawes (Northampton Saints), Joe Marler (Harlequins), Kyle Sinckler (Harlequins), Mako Vunipola (Saracens), Mike Williams (Leicester Tigers), Tom Wood (Northampton Saints).
Backs: Mike Brown (Harlequins), Danny Care (Harlequins), Elliot Daly (Wasps), Owen Farrell (Saracens), George Ford (Bath), Jonathan Joseph (Bath), Jonny May (Gloucester), Jack Nowell (Exeter Chiefs), Henry Slade (Exeter Chiefs), Ben Te'o (Worcester Warriors), Anthony Watson (Bath), Ben Youngs (Leicester Tigers).