Underwater larva. The larva hides in a cone shaped case, 4 cm in size.
No interactions present.
The one up top left looks more like a Sericostomatidae - most likely a Sericostoma personatum if it's not very southern.
Though of this I can't be 100% sure, unless you can post more pics?
Time flies like an arrow, but fruit flies like a banana.
5 Years pro aquatic ecologist.
Claim to fame: Discovered Dikerogammarus haemobaphes in UK.
I agree that the top left is likely to be Sericostoma personatum and the others Odontoerum albicorne. The two larvae are often found together and the cases are superficially similar, but S. personatum is much smoother. There are other differences too such as the colour of the larval head.
Ian Wallace, UK Trichoptera Recording Scheme
Lat/Lng: 50.623194, -4.333498
OS grid ref: SX350829
Fast flowing river, found when lifting large rocks, it hiders on the opposite side of the current.