An indication of size might help. The legs seem to be fairly red and one or two individuals appear to have reddish tegulae. Both features would be consistent with L. phanerura, but the evidence is pretty tenuous.
Not sure if this helps, but have added some copies of photos with more severe cropping. They were certainly a smaller bee than the European Honey Bee. Size more consistent with the Halictids I've come across before.