London Welsh have signed ex-England wing Paul Sampson from Blackheath and lock Kevin Burke from Harlequins.
Sampson starred on the Sevens circuit with England
Three-cap Sampson's previous clubs include Wasps, Worcester, Bath, Wakefield RL and London Broncos RL.
"I'm excited to join and look forward to playing in a fun, hard-working environment," said Sampson, a former star of the Sevens circuit.
Ex-Wales Student and Schools star Burke played for the Exiles in 2004/5 before spending a year with Harlequins.
He has also represented Bridgend and London Irish.