With the Blues seeking a bonus point the visitors' resolve seemed to strengthen, though, and after seeing out the sin-bin period flanker Burban struck back, shrugging off Thomas in a bullocking run down the flank for his side's second try.
But Wasps, who welcomed backflanker Tom Rees after two months out with a knee ligament injury, soon started dominating up front and with Irish scrums disintegrating in the 22, referee Romain Poite lost patience with the Exiles front row and awarded a penalty try.