Data from HadGEM3 model runs in the PDRMIP project. Model version is HadGEM3 GA 4.0. The model has been run by the UK Met Office and Imperial College London. Documentation of the HadGEM3 model can be found in https://doi.org/10.1029/2011JD016074 and https://doi.org/10.5194/gmd-7-361-2014. HadGEM3 delivered data on the base experiment, for the core experiments CO2x2 (doubling of CO2), CH4x3 (tripling of methane), Solar (2% increase in incoming solar radiation), BCx10 (tenfold BC) and Sulx5 (quintupling of Sulphate), and the phase 2 experiments CFC12 (from present day mixing ratio to 5ppb CFC12), CFC11 (from present day mixing ratio to 5ppb CFC11), lndus (from preindustrial to current landuse), N2O1p (from present day mixing ratio to 1ppm). All experiments have been performed with both coupled and fsst ocean settings.