Hi Martin.
I was just in my attic earlier checking on my small trees as well. Due to the warm weather we've been having, some of mine are starting to break dormancy.
Unfortunately I don't have my cold frame finished yet. Looks like I'm gonna have to set up some lights temporarily. Should have the cold frame finished by mid next week. Once I've got the cold frame set up I can put everything from the attic in there.
I also pulled back some mulch from a couple of the trees I have buried on the S side of my house. One looked alive & well. Another looked as if it had been knawed on by something. Hope that's not evidence of a widespread issue :-[ . Have to wait for things to dry up a bit before I can get a better assessment.