This data pack contains processed data from straddle packer pump testing of TH0424 ground investigation borehole at the UK Geonergy Observatory at Thornton Science Park, Cheshire during October 2022. TH0424 (BGS borehole reference NG47NW249) is located at NGR Easting: 344965 Northing: 375857 and drilled to a depth of 101.14 mbgl. Full meta data for the test borehole is included in the borehole information pack (https://doi.org/10.5285/badff3b9-8bc8-4897-b324-7f4653fdd214). This dataset is accompanied by BGS open report OR/23/037 (https://nora.nerc.ac.uk/id/eprint/536445/) which provides context, description, and analysis of the data. Data sets included in this data pack: 1) Groundwater level data as measured by downhole transducers in the isolated packer intervals and outside packer intervals for 20 pump tests at various target depths/zones. Level data includes raw level readings as well as barometric pressure readings at surface and barometrically compensated level data. 2) Pump flow rate data during pump tests 3) Event logs including timestamped events such as packer inflation, pump deployment etc. 4) Hydrochemical data from on-site parameter measurements and analysed groundwater samples collected during constant rate pump tests. 5) Coring/drilling log of TH0410 with timestamped coring progress during the pump testing period. This dataset is included as activities at TH0410 during testing are thought to have significantly impacted data quality. 6) Logged abstraction events from the Thornton Science Park abstraction borehole (Borehole reference SJ47NW25, NGR 344950 375500, ~350m south of TH0424) by means of a pressure transducer attached to the borehole headworks. This dataset is included as abstraction of the TSP borehole is known to drawdown groundwater levels in TH0424.