Gloucester sign Scotland international Chris Harris from Newcastle Falcons on an undisclosed deal from 2019-20.
Gloucester hooker Todd Gleave signs a new deal after playing just five games in his first season with the Premiership side.
Ospreys sign Wales-qualified number eight Gareth Evans from Gloucester, where he made 85 appearances.
Gloucester extend head coach Johan Ackermann's contract just days after their Premiership semi-final defeat by Saracens.
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England head coach Eddie Jones insists Danny Cipriani's omission from the latest training squad is only because of his form, and not for off-field reasons.
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