Information related to the definition and derivation of the geographical grid co-ordinates used to map locations within the UK Biobank resource.

This resource can be downloaded or viewed using the link: UKgrid.pdf

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

 wget  -nd  biobank.ctsu.ox.ac.uk/ukb/ukb/docs/UKgrid.pdf