The three-time champions begin their campaign against last season’s European Challenge Cup winners. 

Toulouse coach Guy Noves has exceptional pedigree in the tournament and took his side to 2008 final but lost out to the red Army of Munster 16-13 in a compelling contest. 

Bath, back in Europe’s premier competition after a two-year exile, will be without Danny Grewcock for their trip to the south of France. 

Sean Meehan’s men also lost fellow lock Steve Borthwick to Saracens but have boosted their second-row department with the experienced Australian Justin Harrison from Ulster.