Confidence: It's likely to be this, but I can't be certain.
Notes: We have a duplication of photographs here and I find it difficult to be sure which lichen ve.emery intends. So I have gone for what seems to be the most interesting and the most plentiful in shot, i.e. the best label that will represent the photograph in the database. So Physcia leptalea is apparently the species with several thalli scattered over the branch, each thallus with multiple lobes more or less appressed to the branch and with long, conspicuous cilia projecting from the margins. Normally one would think of P. tenella or P. adscendens here, but those species would have begun producing asexual soralia at the branch tips I would think, whereas P. leptalea never has these. It is a widespread but very scarce and pollution sensitive species on the British mainland, but more common on the south coast, and I expect it is quite frequent in Jersey. Secondly we have the common yellow species, Xanthoria parietina, several young thalli. The lichen standing up from the top of the branch may well be a Ramalina, and quite possibly R. canariensis. However it is immature and out of focus and I cannot be sure it is not Evernia prunastri at a young stage. In the foreground are extensive areas of a whitish crust, with small, brown or purplish brown apothecia. This is Lecania cyrtella (at least in major part, more than one species can occur together and their spores have to be measured and septa counted.) L. cyrtella is often common on Elder. I see a few apothecia with distinct rims, a Lecanora species, but I am not going to guess which one, and there might be a second Lecania with pale brown apothecia, but these are microscope jobs. Alan. Most of these on my website, P. leptalea recently added, but R. canariensis still lurks in my 3-year backlog.