GT Fungi

Mottled Birch Bolete, Leccinum variicolor, in Gunnersbury Triangle.
The species is edible (if found in quantity!) but not nearly as good as the Orange Birch Bolete.
Psathyrella, a smallish toadstool with a fragile stem, a cousin of the Inkcaps (Coprinus)
Yes you spotted it, not a fungus. A Smooth Newt under a nearby refugium.
These seem to be young Agaricus, probably Wood Mushrooms, in the ivy and leaf-litter.
Well, EVERYBODY noticed this mushroom! Giant Funnel, Leucopaxillus giganteus
Amethyst Deceiver, Laccaria amethystina, very different (alas!) from the delicious Wood Blewit which also has “blue legs”.