The dataset of neutron probe soil moisture observations for 112 sites (428 probe locations) from 1966 to 2013 includes 4 comma-separated tables, derived from the UK Soil Moisture Databank. The data include: • Neutron probe readings (number of neutrons) and Volumetric soil moisture content (m3 m-3) at a range of soil depths • Profile moisture content (m3 m-3) to a range of soil depths • Metadata (includes probe location, maximum depth of readings, soil type, vegetation, start date, end date) • Relevant publications (references and URL where available) for individual datasets The tube site locations are provided as British National Grid references and latitude/longitude in the tube metadata file. Depths of tube readings are provided in metres.