Microlinyphia pusilla
This was found by suction sampling in a field recently taken out of production ready for heathland restoration. It was immature when the live photos below were taken but had moulted into adult by the time I examined it (no photos of it as such as it was dead and discoloured by the time I noticed). The epigyne allowed it to be confidently separated from Microlinyphia impigra.
female Microlinyphia pusilla showing epigyne (3 views), Wendling Beck Environment Project (Norfolk, UK), 4th March 2025