Just a five-minute job this evening - the second nucleus hive containing half the original brood from the swarm colony next to it needs to be sited somewhere else.
The queen cell in this small nuc, shown on the right, is due to hatch out tomorrow, or very soon after. Moving it today means that all its flying bees will happily combine with the swarm colony next to it and work for that colony instead. This will give a boost to the ageing foragers in the swarm colony and also prevent the virgin queen from attempting a 'cast' swarm from the nuc during this week.
I stuffed a handful of grass in the entrance to stop any curious bees from coming out while I carry it across to the new site.
They come out to have a look as soon as the grass is removed but any bees that have already learned to fly will quickly navigate back to the original empty site.
These are our 2 nucleus hives. The queen in N1 should have hatched out yesterday - hopefully she'll be out taking mating flights soon, as she is only fertile for the first few days of her life. If she doesn't have the opportunity to mate within the next 10 days or so, she will never be able to again, so the colony will be unable to raise a new queen by themselves. She would normally mate with a number of drones so that she is able to continue laying fertile eggs for several years.
These are our 'permanent' sites now - both Bea and Charlie have recently been artificially swarmed (the colonies have been 'tricked' into thinking that they have swarmed, but have not actually moved more than a few inches), and the colony on the right is raising a new queen to replace Charlie when she 'swarmed'.If this new queen has not hatched by now then she never will - I'm dying to look inside and check that all is well, but colonies with virgin queens are notoriously unstable. It's not recommended to open their hive until the queen is established and laying successfully. We'll look inside next weekend, expecting to find that she is already laying.
Looking back to this colony it was clear that the foragers from the nuc were not quickly locating the hive next to it. It doesn't show well in the picture, but there were a large number of bees flying back repeatedly to the same spot in the air. As we watched them, they kept flying away and then back again to the empty space. 
I changed a few 'landmarks' for them, moving the chair and the crates, then opened the entrance block to its widest setting. This worked instantly - every bee returning now just hovered briefly, then did one wide loop straight into the hive entrance. They instantly accepted this as their home because the hive scent is still identical to their own - their new queen had not yet hatched so they are actually still members of the same colony.
