I found this jelly fungus on heavily-lichen-encrusted, fallen Ash branches.

As far as I know, neither Stereum hirsutum nor species of Peniophora appear to have any special preference for Ash, so it is hard to tell whether this is Tremella mesenterica or T. aurantia.

This other was not attached to any substrate — perhaps it had been knocked off when the branch fell.

This was also larger, with a lighter yellow colour.