Am I missing a setting or is it just a per country map? When I read heatmap in the title I was expecting the data to be way more granular.
I wonder how that skews the figures. Are folk in NI paid more in line with GB or with Éire? I'm sure currency comes into play too, what with Éire using the euro.
I suspect Ireland also has the same problem, with the higher salaries being Dublin only.