Here’s a line graph showing the results of every nationwide poll that has been published since the beginning of last month:
The performance of the two main parties is clear. They have been neck and neck for some time, with neither as yet able to break clear and establish a sustained lead.
But this graph also shows that the respective scores for both the Conservatives and Labour have shifted slightly upwards. Since the middle of March neither party has been below 30%, whereas both dipped into the high 20s earlier in the month. The peaks have started to get a little higher in the past couple of weeks as well.
By contrast the Green party’s ratings have slipped, with far more scores of 5% and under since the middle of March.
The combined percentage share for the Tories and Labour is also on the move. It’s now hitting 70% more regularly, occasionally reaching 71% and even 72%:
These are only small trends, but they’re ones worth watching as the campaign continues.