Bristol back row Jack Lam signs an extended deal with the club until 2019, while Tonga centre Siale Piutau also returns.
Northampton director of rugby Jim Mallinder says they are targeting a top-six finish after losing to Leicester Tigers.
The RFU appoint Bristol's Mark Bennett as head of sports science, with Connacht's Paul Bunce replacing him.
Christian Wade scores two tries as leaders Wasps move five points clear with a bonus-point win over 14-man Worcester.
Audio & Video
Scrum V: Eddie Butler looks back and assesses Wales' Six Nations campaign (UK only).
Caris Hedd Bowen was diagnosed with Hodgkin lymphoma in 2013, but the Pembrey mum beat the disease and tells Scrum V it inspired her to become a rugby referee.
A programme of rugby union taster sessions that attracted more than 1,000 new female players earlier this year will be rolled out to another 100 English clubs in May.
With latest scores and headlines sent straight to your device, personalisation and much more, ensure you have a great sporting life with BBC Sport.
Get Inspired Activity Finder
Run by the BBC and partners
Find ways to get active near you:
For more ideas, information and inspiration, visit bbc.co.uk/getinspired
Around the Web
Around the UK
How to get into rugby union
How to get into rugby union - into the thick of the 15-player game or try rugby sevens, which made its Olympic debut in 2016.
Rugby notifications, social media and more
Get latest scores and headlines sent straight to your phone, sign-up to our newsletter and learn where to find us on online.
Commentaries, clips and podcasts
Enjoy the best debate, analysis and interviews with BBC 5 live and World Service plus our rugby union commentary listings.
What's on BBC Sport this week
This week's sport on the BBC includes Champion County cricket action, the Merseyside derby and the Boat Races.