We found this caterpillar in our porch.
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Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
The photos I've found of this species show a much yellower body to the larva; but I suppose a certain amount of colour variation has to be allowed for. It certainly doesn't seem to resemble any other moth.
Lat/Lng: 51.5, -2.5
OS grid ref: ST653780