Matt Mullan stakes England claim as Eddie Jones seeks edge over Argentina

• Wasps loosehead prop is vying for a starting spot in two-Test tour• Coach has fostered competitive spirit among squad missing 30 playersMatt Mullan is relishing the chance to lock horns with Argentina’s scrum on England’s forthcoming two-Test tour and believes a strong showing against the Pumas may enhance his claim to hold on to the No1 jersey.With Joe Marler and Mako Vunipola away with the Lions, the Wasps loosehead prop is vying with Ellis Genge for a starting berth against Argentina, traditional heavyweights at the scrum. Of the 30 players unavailable to Eddie Jones 10 are front-rows but…