I think these are Fairy Inkcaps because they are pale, slender-stemmed, with pleated, bell-shaped caps. They grow on rotting wood, and these were near the bottom of the ramp into the watermeadow, which was constructed largely from branches, logs, and dead pampas, so there is a lot of rotten wood for them to feast on.
There is a huge number of inkcaps, all of varying shades and shapes. These are quite different from the Glistening Inkcap.
We have only a small cluster here, but if you search for ‘Fairy Inkcaps’ and select images, you will see stunning pictures of fairy inkcaps clustering in their hundreds, transforming woodland nooks into fairytale scenes.