Larva ID please

[BROCSMAN]

I'd be grateful for an ID on this. Found during a biodiversity survey, and our moth expert thought it was a Geometrid moth, but not sure which.

Thanks.

[charlieb]

It's one of the Ectropis sp., The Engrailed Ectropis bistortata or Small Engrailed Ectropis crepuscularia (some authors consider them to be the same species...)

When was it found? Was it on any particular plant?

[BROCSMAN]

It was found on Friday morning, but I think it was swept up in a net, and we haven't a record of what it was found on. I think the rest of the group will delighted to have got such a good ID, so thank you very much.