Can anyone help ID this please?

Can anyone help ID this please?

Observation - Can anyone help ID this please?. Description: This spider was on the underside of a Dryad's Saddle mushroom. The body was no more than 10-15mm, I think. The large, bulbous part of the body seems to be slightly greenish-tinged. (The picture has been rotated 180 degrees to aid identification)

This spider was on the underside of a Dryad's Saddle mushroom. The body was no more than 10-15mm, I think. The large, bulbous part of the body seems to be slightly greenish-tinged. (The picture has been rotated 180 degrees to aid identification)