Ilex recorded separately
On Buttercup. Frass grains widely spaced, as per
http://www.leafmines.co.uk/html/Diptera/P.ranunculivora.htm
https://www.ukflymines.co.uk/Flies/Phytomyza_ranunculivora.php
https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/diptera/brachycera/agromyzidae/phytomyzinae/phytomyza/phytomyza-ranunculivora/