australia: from Linden Ashcroft
ben-nevis-project: from Hawkins et al. 2019
channel-islands: reprocessing of ISPDv4 stations on Jersey
durham: from Burt 2021
dwr-1900-1910: from Criag & Hawkins 2020
dwr-1919-1960: from Hawkins et al. 2022
emulate-project: reprocessing of data from Rob Allan
iceland: from Trausti Jonsson
italy: from various sources
reading: data from two stations in Reading
scilly: processed data transcribed by Edward Hanna
uk-midas: extraction of all pressure observations from Met Office MIDAS database