Porter not picking up many wickets in last few weeks.
Wouldn't mind taking a punt of Tongue. Stone is another longish shot but someone I've always rated highly.
I don't think Joe Clarke is ready personally. Needs to keep working on his game - but does keep scoring lots of runs.
Livingstone hasn't scored the runs of Clarke this season but I'd go with him and Gubbins.
So my 12 man squad would be
Cook, Gubbins, Livingstone, Root, Malan, Stokes, Bairstow, Leach, Broad, Anderson, Tongue/Stone, Woakes
Livingstone I think is more a 5 or 6 though ideally so unless Root is prepared to bat 3, with Livingstone at 4 I see that as a no go.