Barely bigger than 1 mm in length.
Found on window sill.
No interactions present.
Booklouse is the name given to indoor Psocopterans, barkflies to those that live outdoors. See http://www.brc.ac.uk/schemes/barkfly/homepage.htm, which has pictures and an online-key.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Lat/Lng: 50.8253, -4.5366
OS grid ref: SS214059