Scotland has indeed always had mosquitoes, and it is a thing that they're unbearable in summer: https://www.onlandscape.co.uk/2016/07/dreaded-scottish-midge/ h

Scotland has indeed always had mosquitoes, and it is a thing that they're unbearable in summer: https://www.onlandscape.co.uk/2016/07/dreaded-scottish-midge/ https://www.onlandscape.co.uk/2016/07/dreaded-scottish-midge... This also shows that population testing has been a thing for a while.