One good, one not so good here. Going back in on Tuesday (weather dependent) to see whether I do have a drone laying queen in the second - and if so to try and transfer eggs across from the good hive. All complexity I could do without in my first full season! I had double brood over the winter too but both brood boxes are still being well used so not sure quite how to condense back yet.
Why not leave it as a double brood, they produce a lot of honey if the pollen & nectar are available . they are also a good way of increasing your stocks using a neuc with two empry drawn frames , two of part sealed honey and in the middle two of sealed & new eggs .
To get the bees in the neuc
stopp the double brood box with a foanm strip at about 16.30 hrs. , site the newly made up neuc right infront of the double brood box a lost of the flying bees will fill the neuc .
Now stop the neuc it up with a foam strip , unplug the double brood box , take the filled neuc at least three miles away just before it gets dark to somewhere safe & secure ( I had a farmer pal who let me use a thorn hedge down a long farm track that led to a dead end .) Pull the foam plug and leave it for five days to establish then bring it back to the apiary just before dark one evening sit it on top of the new hive site over night and in day light stock the new hive brood box with the contents Unless your confident in a bee suit using an red filter headlight to do the operation in red light darkness .
If on the next two days you look at the new hive you don't see a drawn queen cell but you do see eggs for insurance use the " bring a different hive frame into the new hive " to be sure you are getting a new queen , then take normal re queening precautions .