Immediately looking at the excellent Bird-dropping Tortrix Moths of the British Isles, I am drawn to Epinotia bilunana/ramella rather than the likes of Eucosma campoliliana. I would say Epinotia ramella on the more solid dorsal patch and the later flight period:-
Jon Clifton - one of the principal authors - runs ALS. A birder of old that nailed the Least Tern when it visited Colne Point from Rye Harbour and someone who spent a few years birding on Shetland thereafter having moved there. A really good chap.