I have updated an issues and requirements page that addresses static model input data at NCI, including UM ancillary files. The page now suggests some next steps, including approaches to sharing, cataloguing and provenance.
See https://code.metoffice.gov.uk/trac/TI/wiki/SIDAtNCI/IssuesAndRequirements (MOSRS login is required).
See also Poster: Improving the reusability of ACCESS model input data and UM Ancillary files database/documentation (We need your help! 🆘)