Looking for some advice.
Went down to look at the hives today and found a swarm ( football size) up in one of the trees. Got my gear to get ready to retrieve but swarm took off and went (back?) into one of the hives. - Lots of bees fanning at the hive entrance

This hive had a nucleus taken - queen and couple of frames - on 16th May.
I checked it again on 24th May and thinned out the charged Queen cells to 1
Checked it again 27th May single sealed QC still there.
So expect the queen to emerge round about now ( yesterday/today) and hadn't intended to look again for probably at least another 10 days till she mated and started laying

So the question is- was this a swarm? and should I look inside now or leave be?-

Any advice gratefully recieved

Johnny