Leo Saffin

iris.coord_categorisation.add_season_membership creates a boolean coordinate that cannot be saved to netcdf

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## 🐛 Bug Report Trying to save a cube that has had iris.coord_categorisation.add_season_membership applied to it fails because netcdf does not allow boolean types ## How To Reproduce Running ```python...

Iris won't load netCDF files from the new CDS-beta

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## 🐛 Bug Report Iris won't load netCDF files from the new CDS-beta. Someone has also reported this on a post about the updates to the CDS API here (https://forum.ecmwf.int/t/changes-to-grib-to-netcdf-converter-on-cds-beta-ads-beta/4322/19)....