Catkins start to appear on alders by mid-autumn, before the current year’s seeds have completely ripened.
These pictures show the unripe seeds and undeveloped catkins on the same tree, as they were in mid-October.
Wildlife from Wolverhampton and nearby
I presume that when this garden was given a slate chipping mulch, it was to suppress anything trying to go there. It didn’t work with these mushrooms.
The fungi are inkcaps. Possibly they common inkcaps, a species which is actually not very common. But I wasn’t about to step onto a stranger’s driveway for a closer inspection.