There is a substantial overlap between the participants in the NIHR IBD BioResource and the long-running IBD UK Genetics Consortium (IBDGC). The Wellcome Sanger Institute performs the sequencing work for the IBDGC. The NIHR BioResource provides DNA samples to this initiative. For those samples, and where there is an additional overlap, e.g. because a participant has been seen before and therefore no new sample is required, this data is being provided to the Gut Reaction Hub by the Wellcome Sanger Institute.