After seeing Dave's note about this species and having reviewed my photographs, I if this is Yponomeuta rorrella? I had two grey small ermines on 27th July. This is darker than Dave's I think but the terminum is grey and there is that little white patch in front. Can the ID of this one also be confirmed? Actually due to a mishap I still have one of the moths, it died a few hours after potting.
Mark Griffiths, Garsington, Oxford.