I over-wintered a couple of hives with a super (ie, a "half-box") under a brood box (National). In mid-April I moved the half-box to the top of the brood box. Both hives have a brood box with 8 frames of brood and a lot of stores. In one hive there is brood on one of the half-box frames and a super (added in early May) is filling. In the second hive there is brood on 8 brood-box frames but none in the half-brood box - the super is not filling. Both hives are crowded and have young queens. They have no queen cells yet but seem good candidates for early swarming.

I can not find much to read on keeping bees on brood and a half. Can anyone offer advice?
Alan.