I might be quite wrong but I'm just wondering... are you positive that's a fungus, Chris? The little lumps look a bit like scale insects, and there's a particular one specific to beech trees which leads to something called beech bark disease.
Since 2019 I've lived in east Clare, in the west of Ireland.
I think the beech scale insects tend to be wooly and congregate in the junction of branches. Try scraping a piece off to see if it is indeed a scale insect infestation. I thought of coral spot as a possible I.D. but that usually only appears on dead brown wood.
I believe these type of jelly fungi only grow on already dead wood, so likely something else killed the twig/branch/tree such as drought, fire blight or phytophthora and this then moved in (if it is indeed that or a related fungus.) I would cut through a dead section and look to see if there is any dark staining in the wood.
A trowel in the hand is worth a thousand lost under a bush.
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Thanks.
I'm just hoping for a definitive answer.
Thanks again.