I think these are all various morphs of the white-lipped snail, Cepaea hortensis.
No interactions present.
Presumably you've seen http://www.evolutionmegalab.org/
I had actually been using a .pdf from that site but hadn't looked a the rest!
I will peruse that today and see if I can submit my results there.
Lat/Lng: 53.8, -1.8
OS grid ref: SE1639