Spider egg sac?

Spider egg sac?

Observation - Spider egg sac? - UK and Ireland. Description: This one was on Salix, but found a few of these now on various species of plants. Assuming it's a spider egg sac? Anyone know which? Thanks!

This one was on Salix, but found a few of these now on various species of plants. Assuming it's a spider egg sac?
Anyone know which?

Thanks!