Spindle Ermine caterpillars?

Spindle Ermine caterpillars?

Observation - Spindle Ermine caterpillars?. Description: On spindle, making tents with their silk. Googling seems to suggest Spindle Ermine Moths? Only noticed on one spindle shrub in hedge - others nearby didn't have any caterpillars at all.

On spindle, making tents with their silk. Googling seems to suggest Spindle Ermine Moths? Only noticed on one spindle shrub in hedge - others nearby didn't have any caterpillars at all.