UK communications regulator Ofcom has released UK radiowave propagation measurement data for frequencies between 449 MHz and 5850 MHz
This radiowave propagation measurement data was collected by Ofcom in seven areas of the UK between 2015 and 2018. It is representative of the UK’s diverse topography. Measurements were made at six frequencies between 449 MHz and 5850 MHz. All equipment was carefully calibrated allowing the basic transmission loss to be calculated.
Ofcom is using the data to assess and improve UK specific performance and applicable frequency ranges of propagation prediction methods, including ITU-R P-series Recommendations.
PDF doc - UK radiowave propagation measurement data for frequencies below 6 GHz - provides information on the technical parameters and describes the format of the measurement data files - https://www.ofcom.org.uk/__data/assets/pdf_file/0027/158148/sub-6ghz-propagation-measurement-data.pdf
Spectrum Open Data CSV files - https://www.ofcom.org.uk/research-and-data/data/opendata#accordion__target-92004