White fragile case around fibrous/furry interior containing tubular chambers. Found loose on moss under heather.
No interactions present.
The first four pics show show cocoons very like the Oak Eggar, in particular the 4th pic. Maybe its the same one in all 4, looks good for Oak Eggar but could well be the Northern Eggar being in Yorkshire?
5th pic is the Emperor moth cocoon. Not sure of the 6th pic, not an eggar as they pupate in the ground, a drinker or a parasitised Emperor?
Oak and Northern Eggar may be found together in Northern England?
Lat/Lng: 54.3, -0.6
OS grid ref: NZ9600