mm wouldn't work in London or any where with considerable commuting I used to get in a 8:45 the rest of the team at 9:30 - that is 45 mins per day used suboptimaly.
we do it at 10:30a, and most of the team is in by 9:30.
so you have over 1.5 hours potentially of people hanging around waiting for the meeting to set the days priority's.
From a time and motion perspective Better to do it at the end of the day so that you can be productive from the get go.