The dataset contains 2 km resolution gridded daily potential groundwater recharge time series covering the British mainland from the Enhanced Future Flows and Groundwater (eFLaG) project. The data include simulations driven with historical observed climate data (1962-2018) and simulations driven with bias-corrected UKCP18 'Regional' 12km projections. Full details about this dataset can be found at https://doi.org/10.5285/b14839e5-03e0-43ff-9382-1be2daf3baba