The YouGov favourability trackers are just about the only polling where we can compare leaders with their parties on the same basis. The same question is asked in exactly the same form to the same sample whether people have a favourable or unfavourable opinion of CON/LAB/TMay/Corbyn.
It is also a tracker which is asked in the same form at regular intervals which means there are enough data points to examine trends.
The movement in the leader and party ratings since the general election was called just over a year ago is shown in the chart above. As can be seen Theresa May was doing better than her party but went behind after the election. Only in the past few weeks is she doing better again
The Corbyn and Labour party figures have been consistent over the time period. Labour Party has always been viewed more favourably than its leader a situation that remains.
In the chart the unfavourable figure is subtracted from the favourable figure to give a net number in each case for each data point.
All this rather undermines the notion that is often heard by his supporters that it was Mr Corbyn rather than the party that gave the red team a better than expected result last June.