The Dragons got off to a flying start when back row man Tom Brown crashed over for a try at the posts after only seven minutes and the unerring boot of Welsh international Tom Prydie kept them in the contest throughout.

The full back didn't miss a kick as he converted Brown's try and kicked four penalties. The Dragons had other chances to score, notably when Lewis Robling cut through in the first-half and Andy Tuilagi was held on the line in the 80th minute, but in the end they had to settle for a losing bonus point.

Bayonne will have home advantage over Wasps when they meet in Round 3 on December 8.