Exidia thuretiana – White Brain Fungus.
All the references I looked at suggest that White Brain grows on the wood of deciduous trees, particularly beech/ash. The attached jelly like fungus was growing in a mature pine forest, on pine needles on the forest floor, without a deciduous tree for miles! However, in all other respects it ticks the boxes for White Brain.
Have some on my property. Thanks for letting me know what it is