Hard seed-shaped case on clematis. c5mm. Brown with bronze sheen. Inside filled with white 'rice flakes' containing orange bugs.
No interactions present.
Aren't scale insects individual creatures, rather than this which is obviously isn't?
The brown shell is the dead female underneath which are eggs and recently-hatched young. See -
Moo's question had occured to me - hence my ID suggestion. Thanks to Alan Thornhill for explanation.
Lat/Lng: 51.224166, 1.193705
OS grid ref: TR230520