Thanks guys for the replies. It never occurred to me that catching the queen (or securing her somehow) was so important.
I'v seen JP and Hardwood painstakingly try to find the queen in every video, I tried to find her but it was nightfall, and I just cut the branch with the swarm and put it into the TBH, hoping that since the queen was in the box, then they would stay.
They stayed for one day, then the next morning no bees to be seen.
Nothing like learning first hand
BTW, love your videos JP and Hardwood, can't wait to see Schawee back at it