Unknown mushroom on cycle path

Unknown mushroom on cycle path

Observation - Unknown mushroom on cycle path. Description: Observed over the course of five days next to a cycle path. First spotted as a pure white tennis ball after a week of rain. It started to yellow at the top as it grew and was picked on day five. One of a fused pair with a tough-ish stem; some very dark br

Observed over the course of five days next to a cycle path. First spotted as a pure white tennis ball after a week of rain. It started to yellow at the top as it grew and was picked on day five. One of a fused pair with a tough-ish stem; some very dark brown spores brushed off onto my hand when picked.

On the fifth day I noticed some other mushrooms coming up about 2m away from the first (see 3rd image).