Having verified that the participant is willing, a UK Biobank staff member enters their username to record their identity.

This resource can be downloaded or viewed using the link: acon18_uname.png

If you have wget available (typically on linux systems), then you can also obtain a copy using the command

 wget  -nd  biobank.ndph.ox.ac.uk/ukb/ukb/images/acon18_uname.png