The tighthead has played seven games for Saints this season after returning from a six-month suspension. He made his Saints debut against Worcester in the Powergen Cup, but was thwarted from making further appearances due to a calf injury, from which he has now recovered.

Director of rugby Budge Pountney said: “We wish Colin all the best with his time in Biarritz and hope that he gets some good game time out in France.”