Thanks everyone for your insights into this.
Very interesting indeed.
Why I ask this question is very simple.
One of my colony's swarmed Thursday June 5th. Clipped queen which as couldn't fly, climbed up wind break fabric which is stapled around my hive hive. She settled with bees under landing board, but majority of the swarm ended up behind the fabric, underneath hive floor. When I knocked them off into a box, saw the queen, so up turned the box with stone under one corner until that evening., when they were re homed in a poly nuc with new frames, along with frame of brood. They are all settled now & happy. The other bees ended up having to go back to the hive as I couldn't get them out from behind the wind fabric as stapled in place.
So most of prime swarm had to go back into hive where they came from. Checked hive and saw brood & eggs. Sealed cells in which decided just to leave one.
Went back 4 days later June 8th, and they had several more cells, capped & uncapped. Had to abort due to very aggressive guard bees. Weather also un favorable, thunder storms with localized down pours.
Capped cell that I left June 5th ,if viable would have hatched yesterday June 12th or today.
I put a swarm trap on yesterday morning, it attaches to entrance. Q excluder door that I have to close at 10 am & re open at 3pm. Bees can work away but if swarm issues, it traps queen.
So more queens would be due to hatch within next 4 days. So my plan was, catch the swarm, put new brood brood in original spot & get all flying bees back in there.
Love Beekeeping <3