Just did a quick search of the last couple of England squads and saw what midfielders actually got picked! Fabian bloody Delph, Barkley, Downing? Mason is a shoe in.
I wonder if it will be the same for Dier, England have bugger all Centre backs these days. Only position England are strong in now is the forwards weirdly enough (Kane, Sturridge, Ings, Austin, Berahino, Sterling).