It's hard to predict Southgate.
but any sensible manager I think would be looking at it as Stones and Colwill competing for LCB slot. Stones ahead at the moment. Dunk competing against Guehi, Tomori and maybe White for the RCB slot. As things stand, Dunk surely a million miles ahead of those...
I'll predict Dunk, but not Solly.
Too much competition for a spot for another winger to be incorporated. About 8 players would have to be injured for Solly to play in a match that mattered.
Whereas Dunk has been the most in form, English centre back, currently fit, for a long period of time.