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The advent of a 23-man bench means the Lions will probably take three tight-heads and three loose-heads. Gone are the days of men who could "play" both sides of the scrum.
At tight-head, Dan Cole and Adam Jones are nailed on to tour. The duo will spend the tour battling it out for the right to anchor the Lions' scrum.
The third man likely will be confined to the "dirt-trackers" so a emphasis will be placed on what they can add to the squad as a personality.
Euan Murray's humour surprised people on the last tour, and he wouldn't let anyone down if injury forced him into the test side. Battling him is Ireland's Mike Ross. A quiet but popular character, it will come down to the impression he left on Gatland in his limited face-time.
Aside from Ireland's Cian Healy, the Lions have a conundrum at loose-head. Gethin Jenkins is surely too good to ignore, even with his potential appearance in the Top 14 final.
If Gatland sticks to his guns, Jenkins won't travel, but I don't see that happening.
The final spot will come down to Ryan Grant and Mako Vunipola. Grant is the more experienced option, and better scrummager, but Vunipola is a serious force in the loose.
Jenkins and Healy are as good as Vunipola in the loose so Grant should get the nod to tour.
Tourists: Jones, Cole, Ross, Healy, Jenkins, Grant
Potential wild cards: Andy Sheridan and Alex Corbisiero
They are the two most damaging scrummagers available to Gatland but both come with questions. Corbisiero has been out for five months while Sheridan has been out of the international game for a few years. If Gatland plans to attack the Wallaby scrum, he could pick one of this duo.