Toad Rush Case-bearer Coleophora lassella
First recorded in Norfolk in 2018 with quite a few more records from 2022 onwards (see Norfolk Moths).
It is necessary to examine the genitalia to identify this species.
male Toad Rush Case-bearer Coleophora lassella showing genitalia (two parts of aedeagus separately), North Elmham (Norfolk, UK), 18th July 2022
Judging from Sussex Moths there don't seem to be many records in East Sussex yet.
female Toad Rush Case-bearer Coleophora lassella showing genitalia, High Hurstwood (East Sussex, UK), 23rd July 2022
Another female - by 2025 this species is evidently on the rise.
female Toad Rush Case-bearer Coleophora lassella showing genitalia, Wendling Beck Environment Project (Norfolk, UK), 1st May 2025