Before refining their job category users were shown supplementary information expanding on the sub-category criteria.

This resource can be downloaded or viewed using the link: oh_group_level2_popup.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/oh_group_level2_popup.png