The rest of the Six Nations must "watch out" for an England side who have learned hard lessons under Steve Borthwick, according to Harlequins scrum-half Danny Care.
Saracens missed out on the chance to book a Champions Cup round of 16 home tie as Castres produced a stunning victory in London.
Former England scrum-half Danny Care has revealed he will complete his 20th season at Harlequins by staying at the club for another year.
Harlequins ended their three-game winless run in the Gallagher Premiership with a 38-14 victory over Newcastle at Kingston Park.
Bath inflicted a record Gallagher Premiership defeat on 14-man Saracens as they powered to a 68-10 victory at the Recreation Ground.
Gloucester beat an out-of-sorts Harlequins at Kingsholm as the visitors were blanked in a league game for the first time in a decade.
Northampton overcame the loss of injured captain George Furbank to post a statement 30-21 Investec Champions Cup win against the Bulls in Pretoria.
Marcus Smith has signed a new long-term contract that will keep him at Harlequins until at least 2028.