I have attached a couple of pictures of some mining bees that I photographed in the centre of the school, on the edge of The Green. The bees were coming and going from holes in the gaps at the edges of some stone slabs. They look quite different in the two pictures but I think they are probably of the same species and I am trying to get an ID. In the first picture, the bee was hesitating a bit because it was coming face-to-face with an ant that you can just see.
I believe that the bees are of the species Halictus rubicundus. This is a sweat bee and this kind of bee gets its name because it is attracted to the salt in human sweat. It is especially interesting because it is a solitary species in northern areas, or at large altitudes, but it is social at low levels in the south. These different behaviours are observed within Britain.