London Irish have confirmed the signing of second row Eoin Sheriff from Saracens for the 2015-16 season.
The 26-year-old - a former Ireland youth international - made 20 appearances in all competitions for Saracens, having arrived from Leinster in 2011.
"I am really looking forward to starting at London Irish," he said. "The facilities at Hazelwood are outstanding and their ambition for the future is clear to see.
"It is an exciting move and one I am relishing."
London Irish operations director, Bob Casey, added: "Eoin is an ambitious player who is excited to be part of our plans going forward. He has represented Ireland through the age groups and also has Premiership experience.
"He has the right character and the right attributes to be a very good player for London Irish."