These data represent daily values (daily mean, instantaneous daily output) of selected variables for ENSEMBLES (http://www.ensembles-eu.org). The list of output variables can be found in: http://ensembles.wdc-climate.de/output-variables. The HadCM3C model output was prepared for the ENSEMBLES experiment using UM run ahkyp (1859-2000). The model was initialised from a HadCM3C preindustrial control run with fixed 1860 forcing conditions. Although the model contains an interactive land/ocean carbon cycle, anthropogenic forcings (only) were prescribed to follow observed concentration values rather than emissions, i.e. prescribed changes in concentrations of: CO2, CH4, N2O, CFC11, CFC12, CFC113, HCFC22, Ozone. Sulphur-cycle emissions also provide a forcing input. No variations were made to solar radiation and volcanic aerosols. The output datasets are available in netCDF format. The dataset names are composed of: centre/model acronym (METO-HC_HadCM3C); scenario acronym (e.g. SRA1B: SRES A1B); run number (e.g. 1: run 1); time sampling abbreviation (MM: monthly mean, DM: daily mean, D0: daily instantaneous at 0 UTC, 12H: 12-hourly instantaneous, 6H: 6-hourly instantaneous); variable acronym [with level value] (e.g. hur850: relative humidity, 850 hPa) --> example: METO-HC_HadGEM2AO_20C3M_1_6H_hur850.