I’m not sure of the question, are you asking how long you’d need to connect in ATL ?
I'm not sure - but maybe asking the time to tranfer from Miami craft to board the outbound flight (time lapsed while on the ground at Hartsfield).
Mondo - you may need to give us your flight times (arrival and departure times MIA-ATL and ATL- UK)
Yep, should be plenty of time.
At least an hour for sure.