Strange web like casing

Strange web like casing

Observation - Strange web like casing - UK and Ireland. Description: I'm really unsure of what this is. It looks like some kind of web casing, but the texture is differe

I'm really unsure of what this is. It looks like some kind of web casing, but the texture is different from that. Kind of fragile, but still solid. I imagine it is from some kind of invertebrate. It appears that is something inside of it, so perhaps it is some kind of cocoon or egg?