on rocks on beach
No interactions present.
This is probably the edible winkle Littorina littorea but there is another species, the rough winkle Littorina saxatilis, that is very similar. You really need to look inside the shell opening to distinguish them.
I like this photo a lot because it shows the winkle feeding, about the only behaviour you're likely to be able to illustrate with this species.
tried to shift likely - failed!
Lat/Lng: 51.1, 1.3
OS grid ref: TR3643