Metopoplax ditomoides
Sounds like this species may have only just arrived in Norfolk - I know of one other record, from two days before this.
This one was found in my bathroom. The shape of the front of the head is bizarre - check out that spatulate clypeus!
 (1).jpg)
 (2).jpg)
 (3).jpg)
 (5).jpg)
 (4).jpg)
 (8).jpg)
Metopoplax ditomoides, North Elmham (Norfolk, UK), 12th November 2022