Lying on the path, mouth gaping open, possibly in process of shedding skin?
No interactions present.
The skin does look loose but this is not normal behaviour for skin shedding as they usually hide away. It looks to me like it is injured, perhaps it has been trodden on and maybe on purpose.
I did suspect that was the case. It is a well used path by dogwalkers etc.
Lat/Lng: 51.47384, -2.57592
OS grid ref: ST600751