Fungi and rain

The fungi came before the rain which is falling steadily. Viticulturists won't want rain but it is only for a day according to the forecast.

This was on the lawn but I picked it thinking it was an edible one I recognised. I don't think so, so I have blipped and put it back. It intrigued me to see the darker line across the gills caught by the light which moved as I moved round it.

I haven't managed to identify it so if you know I would love to learn its name.