Sale's Sebastien Bruno, Rory Lamont and Juan Martin Fernandez Lobbe, Munster prop Tim Ryan, Bristol flanker Joe El Abd, Saracens back-rower Kris Chesney and Cardiff centre Jamie Robinson were all included in the list as well as Wilkinson's former team-mate May.
Toulon are skippered by South African back-rower Joe van Niekerk while Australian scrum-half Matt Henjak, Argentine pair Contepomi and Juan Fernandez Lobbe and French hooker Sebastien Bruno also make up Philippe Saint-Andre's squad.