Ok so 36 Man Squad that i would pick is:
Loose Head: Marler, Genge, Rodd
Hooker: Cowan-Dickie, George, Blamire
Tight Head: Sinckler, Collier, Stuart
Second Row: Itoje, Launchbury, Hill, Lawes, Martin
Back Row: T Curry, Dombrandt, Simmonds, T Willis, Underhill, Barbeary
Scrum Halves: Youngs, Quirke, Randall
Fly Halfs: Smith, Farrell, (Bailey/F Smith/Atkinson - one of these 3)
Centres: Slade, Tuilagi (If Fit), Marchant, Northmore, Kelly
Back Three: Steward, May, Malins, Hassel-Collins, Radwan
I think this is roughly 35/36 excluding apprentices. I'd expect 2 forward apprentices and maybe 2 in backline if chosen - one of the forwards i'd have in as an apprentice is Ollie Chessum - awesome player)