Large snail shell at bottom of dried out pond. Not sure of species
No interactions present.
The large shell is certainly Great Pondsnail, Lymnaea stagnalis, and the small one is probably Radix balthica, alias Lymnaea peregra, the Wandering Pondsnail.
Thanks, there were loads of the big ones.
Lat/Lng: 51.958318, -0.638075
OS grid ref: SP936297