London Irish have brought in former England sevens specialist Christian Lewis-Pratt on a short-term contract.
Gloucester prop Sila Puafisi will join Glasgow once his Rugby World Cup commitments with Tonga are complete.
English clubs say they will allow their players to compete at next summer's Olympic Games as part of Great Britain's Sevens team.
London Irish winger Alex Lewington has committed his future to the club by signing a contract extension.
Bristol flanker Marco Mama has joined Aviva Premiership new-boys Worcester on loan until the end of February.
Christian Wade believes Wasps' togetherness will help them target the Aviva Premiership play-offs this season.
Harlequins have named Danny Care as skipper for the upcoming season.
Guy Thompson has signed a new long-term contract with Wasps.
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