Northampton Saints took the final Premiership play-off spot despite losing to Exeter, while Bath secured Champions Cup rugby next term.
Harlequins have announced that former Scotland wing Tim Visser is to retire at the end of the Premiership season.
England's Rugby World Cup preparations have been hit by the news prop Mako Vunipola will be out for three months due to hamstring surgery.
Mako Vunipola's season is over after he suffered a torn hamstring in the European Champions Cup win over Leinster.
There will be three Du Preez brothers - including twins - and identical Curry twins at Sale Sharks next season.
Hooker Jamie George waxed lyrical over Billy Vunipola following his magnificent display in the European Champions Cup final.
Adam Coleman will join Waisake Naholo, Sekope Kepu, Paddy Jackson and other new signing at London Irish in the Premiership next season.
London Irish continued their spending spree ahead of their return to the Premiership by sealing a move for Waisake Naholo.
Paddy Jackson will leave Perpignan after a single campaign in France, joining London Irish for their return to the Premiership.
James Haskell had looked to boost his Rugby World Cup chances at Northampton Saints but will now retire at the end of the season.