The bird box attached to our apple tree in the back garden didn't contain Coal Tits but Great Tits and over 2 days they fledged. Two came out but the other refused for a couple of days. Eventually they were all out, hopping on the ground.
I took this photograph of two of them at long distance, as didn't want to scare them. Not the best way to take a photograph with my little camera but at least you can see them. They were busy playing near our newly re-vamped water butts behind the garage: