Unknown caterpillar

Unknown caterpillar

Observation - Unknown caterpillar - UK and Ireland. Description: We found this on our small Honeysuckle shrub but no idea what it is. There was two, both about 30mm in length. Hope someone can help out, thanks!

We found this on our small Honeysuckle shrub but no idea what it is. There was two, both about 30mm in length. Hope someone can help out, thanks!