Like other Ireland players, Ulsterman Davidson has suffered a lack of exposure due to the postponement of their last three Six Nations games owing to the foot-and-mouth crisis. Ironically, a hand injury denied him a place in the two matches played. 'Second row is perhaps the most competitive selection area of all,' said Henry. 'It's important we look at every contender.' Davidson is not the only Castres player anxious to stake a late claim. Scotland's Gregor Townsend, whose Six Nations appearances have been hit by injury, will also be anxious to impress.