Artificial intelligent assistant

Identify this caterpillar !unknown caterpillar Could anyone try to help identify this caterpillar, there are loads of them all over my garden and I've got three of them in a makeshift caterpillar house. I've had them for about a week and they've grown to about 3 or 4 centimetres in length and I am yet to see any of them form pupae. I am from London by the way. EDIT: they don't seem to be too fussy about what they eat, I have found them on honeysuckle, rose bushes and even some nibbling on the bind weed I've pulled recently. !enter image description here !enter image description here !enter image description here

Actually, the animal is not a caterpillar but larva.

The species is Abia lonicerae Sawfly, discovered by Linnaeus 1758.

(Another picture)

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