Caterpillar emerging from web

Caterpillar emerging from web

Observation - Caterpillar emerging from web. Description: This caterpillar appeared to be emerging from a web cocoon in the flower head of this plant. When disturbed it would concertina back into the flowerhead. We'd love to know what it is, we've been hunting online for an ID but not found anything.

This caterpillar appeared to be emerging from a web cocoon in the flower head of this plant. When disturbed it would concertina back into the flowerhead.

We'd love to know what it is, we've been hunting online for an ID but not found anything.