Mining bees/solitary wasps? and burrows

Mining bees/solitary wasps? and burrows

Observation - Mining bees/solitary wasps? and burrows. Description: I noticed recently that my neighbour has dozens of nest burrows in the soil beneath his gravel. I watched for a while to see what would emerge from them. There were lots of ants ferrying eggs in and out of the holes but I also noticed some other inverte

I noticed recently that my neighbour has dozens of nest burrows in the soil beneath his gravel. I watched for a while to see what would emerge from them. There were lots of ants ferrying eggs in and out of the holes but I also noticed some other invertebrates (see attached photos - sorry for poor quality of some). A couple of them look like they might be Andrena sp. but is the other one a solitary wasp of some sort? If so, is it normal for different species (ants, bees and wasps) to use the same system of burrows like this?