Ditropis pteridis
Formerly placed in the genus Criomorphus, this is apparently a very common species on Bracken.
This individual was found on Bracken and I tentatively identified it as this using the British Bugs website. However that website only showed individuals with darker brown or blackish wings, whereas this individual had pale brown wings, so I checked it against the RES key. The frons, lacking dark markings and with two indistinct keels running throughout its length, confirmed it was pteridis. There is a photograph of a similar individual on the eakringbirds.com website.
female Ditropis pteridis showing keels on frons, Barrow Common (Norfolk, UK), 10th June 2022
This female was more typically coloured, swept off Bracken in woodland. It was 3mm long. The first two photos were taken with photo-stacking and it moved slightly for the first one - hence the extra appendages!
female Ditropis pteridis showing frons, Wendling Beck Environment Project (Norfolk, UK), 27th May 2025