Description of quality control measures undertaken at Wellcome Trust Centre for Human Genetics, Oxford for the Interim release on 150K participants in 2015.

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