neither of the blue ones look "edible"as such but they might be "wow"
the only uk one of that colour that i know of is rather interesting ,it has had several name changes but perhaps was called hyphaloma cyanesens (spp?)and looks a bit like the "plump one" might do if it grew up to have an upturned rim.the little blue ones have a similar shape to papilonicus (spp?) which are related to a few interesting species .
just cos they grow on trees ,unlike some of the other blue ones, might not rule out interesting alkaloid content.
iirc the blue colour is an oxidation product at least one of the relevant alkaloids.