Sleepy

Found this poorly camouflaged caterpillar in amongst the old stems of the catmint that is only just producing fresh leaves. Anyone know what kind? It's probably just about to decimate the whole garden but I tucked it back where it came from, out of sight of the birds.

Think it might be an Angle Shades moth http://www.wildlifeinsight.com/british-moths/angle-shades-moth-phlogophora-meticulosa/