In a move much awaited by polling geeks, YouGov has launched its YouGov/Sun daily tracker, the innovation which they hope to popularise is the daily approval score. It asks a simple “Do you approve or disapprove of the Government’s record to date?”

Last night it recorded a 2010 high for the Tories on 43% and a 2010 low for LibDems on 15%, a result which will be seized upon by Labour and worry the left of the LibDems. In a time of coalition government it is the Approval Score which has the potential to become the most useful tracker of public opinion. Guido suspects as spending cuts bite it will become very closely followed…