Premiership club Bath sign versatile forward James Phillips from relegated rivals Bristol on a one-year contract.
Edinburgh sign 26-year-old loose-head prop Darryl Marfo from English Premiership side Bath on a one-year deal.
Bath number eight Paul Grant extends his contract with the Premiership side.
Worcester Warriors sign Bath and Scotland international forward David Denton, who can play in the back row or at lock.
Audio & Video
Speaking to BBC Radio Bristol, Bath coach Todd Blackadder offers no comment over a reported move to sign Leigh Halfpenny.
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 alerts, newsletters and social media
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 tennis from Queen's Club, horse racing at Royal Ascot and the Azerbaijan Grand Prix.