I had another look into Hive D to see whether there was a Queen. I didn't see one but I might have missed her. I looked carefully for young but saw only honey and stored pollen.

My bee group have suggested that the swarm might have left their parent colony with a virgin Queen. In that case it could take time for her to mate and produce brood.

Looking for brood in the new colonies

I had a quick look into hives B, C and D yesterday afternoon. The news is mixed.

The best news is that I see no evidence of AFB. I'm not experienced enough to be certain so I'll continue to keep a lookout. I'll also review the NBU Foulbrood Diseases advisory leaflet.