Hi Geoff,
TO me they look like an Italian, Carnolain hybrid. The last picture are Irish Dark Bee some of the bees you see in the photo are drifters from the strong colony, they got lost one day I was working with both hives. All the nurse bees in that hive are black and also the queen is black as I seen her on Saturday. I shall bee sending a sample of those bees to get them tested to see how pure they are or NOT!
Busy Bee