Usnea flammea Stirt.
More commonly found on rock faces in coastal locations. The finer branches are often wiry and can produce a tassel effect as then end at the same length.
Smith et al. editors (2009) The Lichens of Great Britain and Ireland
Dobson (2018) Lichens: an Illustrated Guide to the British and Irish Species
Thell & Moberg, editors (2011) Nordic Lichen Flora, Volume 4: Parmeliaceae