London Irish have brought in former England sevens specialist Christian Lewis-Pratt on a short-term contract.
London Irish winger Alex Lewington has committed his future to the club by signing a contract extension.
Exeter Chiefs have signed winger James Short from London Irish on a one-year contract.
English clubs say they will allow their players to compete at next summer's Olympic Games as part of Great Britain's Sevens team.
Melbourne Rebels have signed Irish prop Jamie Hagan to a two-year Super Rugby contract.
London Irish flanker Ofisa Treviranus will captain Samoa in their historic home Test match against New Zealand next month.
European Challenge Cup holders Gloucester will face local rivals Worcester Warriors in the 2015-16 competition.
London Irish have announced that one of their Aviva Premiership matches in the 2015-16 season could take place overseas.
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