It is a Phyllonorycter oxyacanthae, one of the pretty micro-moths of about 4mm in length.
You can not determine this moth from 2 similar species from the wing pattern, but you can if you actually reared it from its leaf mine.
And now for matches - which I have failed to do so far. The story so far is that I noticed some "larval spinnings" on the Gorse bushes in Carding Mill valley. I took some home to identify, but so far have been unable to match my photos to the moth in question. More work needed, plus an improvement in the weather to go and look for more.
|Unknown larva on Gorse|