Don't know which one you work for, but I've worked for three, two of which were "substantial" and they all did it.
Starting on earlies finishing on lates is the easiest way to make a roster work as you can do 3 earlies then onto lates whilst complying with CAP371, but you can't do lates to earlies without a short duty in the middle which would probably require more crew per aircraft to make it work.
That's for multi sector shorthaul, don't know about charter/longhaul.