It's been particularly bad this year because of the weather but sadly there is a longer term downward trend ...At least that butterfly was photographed in East Putney. https://www.theguardian.com/environment/article/2024/aug/15/britain-insects-surveys-butterflies-climate-aoe#:~:text=Insect%20populations%20are%20dealing%20with,that%20depend%20on%20those%20habitats.
Michael Ixer ● 96d