Not certain if these are both indeed what I am suggesting so any comments will be great, thanks. Found on a decid tree branch.
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Some fungi are very poisonous so a mistaken ID could have serious consequences.
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the first photo shows Ramalina farinacea - becoming pendant, with a smooth cortex and just-visible, discrete, rounded soralia. The second photo is Evernia prunastri. It's not always easy to tell the two species apart.
I did think that the first photo might be a Ramalina sp but as I'm just a beginner, I wasn't sure how best to separate them in the field.
check the colour of the upper and lower surfaces. They are the same in the Ramalina, which has a continuous cortex, but different in E. prunastri - green above and white below, just like in your photo. Technically, this makes E. prunastri foliose, not fruticose.
Lat/Lng: 52.3484, -1.1428
OS grid ref: SP584726