Ectropis spp.

HW image added just in case it helps confirm the ID.
Similar species is E. bhurmitra. Both are given in Hampson FOBI, Vol 3, page 260. bhurmitra is supposed to be more brown than gray and with heavy markings too.
1) http://www.lepiforum.de/lepiwiki.pl?Ectropis_Crepuscularia 2) https://bugguide.net/node/view/11374 3) https://www.gbif.org/species/1980783 4) http://ftp.funet.fi/pub/sci/bio/life/insecta/lepidoptera/ditrysia/geometroidea/geometridae/ennominae/ectropis/#crepuscularia 5) https://www.inaturalist.org/observations?place_id=6681&taxon_id=143009 Shows variation in wing pattern and is very widely distributed, also to Europe.