This vector dataset represents the Variscan faults for the early Carboniferous limestone (ECL) in hot sedimentary aquifers in the UK, used by D J.R. Jones, T. Randles, T. Kearsey, T.C. Pharaoh, A. Newell (2023). https://doi.org/10.1016/j.geothermics.2023.102649.