Jones was ruled out of the autumn internationals with a shoulder injury he sustained during the second test of the Lions tour to South Africa.

But the 28-year-old looked back to his best when he drove Ospreys to a 17-12 victory over English champions Leicester Tigers last weekend.

And with Jones back in the fold, Gatland, who was in a confident mood at the RBS 6 Nations launch at the Hurlingham Club on Tuesday, is preparing to use the foundation of an all-Lions front row to launch his side’s tilt at their second title in three years at Twickenham.

“It is fantastic to have Adam back, the scrum is going to be pivotal during this year’s competition both in terms of territory and penalty counts,” said Gatland, who is set to name hooker Matthew Rees and prop Gethin Jenkins alongside Jones in the front row.

“Adam is the key for us in that role and he brings a great deal of experience and a fantastic ability level to that position.

“I’ve spoken to Adam about a leadership role and taking responsibility at scrum time. He’s in good shape and he’s also a very skilful player.”