Wasps have signed forward Alex Rieder from Rotherham Titans.
England scrum-half Joe Simpson is nearing a return to full fitness as he builds up preparations for the 2015 World Cup.
Defending champions Toulon have been drawn in a brutal pool with Bath, Leinster and Wasps in the 2015/16 Champions Cup.
Wasps have completed their ninth signing of the off-season with prop James Johnston joining the club from Aviva Premiership rivals Saracens,
Wasps centre Chris Bell has been forced to retire with immediate effect because of a shoulder injury.
Joe Launchbury will make his first England appearance in a year against the Barbarians on Sunday at Twickenham.
Wasps have announced the signing of former Australia Test flanker George Smith for next season.
Wasps have signed Brendan Macken, Tom Bristow, Jamie Stevenson and James Downey for next season.
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