Many thanks for your comments xylaria. Are either toxic at all, especially coral spot disease, as these logs are in a school and used for forest school activities.
All the best,
Jay
coral spot disease is toxic to trees causing branches to die back, its life cycle is very interesting and might make an interesting lesson.
There is no fungi in britian that is toxic by touch. Big visable fungi need to eaten to be poisonous. Some very small fungi like molds can make people especailly asthmatics ill, but niether of these are molds. Fungi are rarely deadly toxic, and are really interesting part of life, from microscopically small to forming underground mats spread over miles.
No person has ever tried eating coral spot fruit bodies, and the bulgaria is black snotty stuff, presuming individuals that randomly put stuff in their months have 1 to 1 supervision the chance of any toxic effect is infantesimal IMHO. The bulgaria might be jelly ear [auricularia] looking at the specium on the bottom, jelly ear is edible. It looks like ears when is it drier, and dark brown jelly in the rain.