Simulation data:

Bolam model (nickname "Bolam") with the soil-vegetation-snow parametrisation of "Pochva" scheme (2018) horizontal resolution 0.075 degrees in rotated coordinates (about 8 km), 60 atmospheric levels

Observation data:

WMO GTS, Synop-Land, ECMWF archive
Data at 9 UTC in Great Britian only

Set of observation points (about 100 points):

Time series of errors as a function of forecast term

Errors in observation points for various forecast terms