There is always a problem with polls when the electorate is closely split. The results vary day by day and by their nature are inherently inaccurate. They generally consist of a small sample and the results are massaged in ways thought to be representative of the views of the majority. No one has the courage to define the error bar but I would suspect it could be around the 10% mark. Therefore all the polls are suspect.

The tories anticipated the loss of 500 seats
Labour anticipated a gain of 400 seats.

The reality was -1300 and -80 respectively and a massive vote of no confidence by the electorate for both parties.

The acid test will be the EU elections but I suspect a stitchup is in the offing between May and Corbyn to sell us out and prevent the forthcoming election.
The result will be neither fish nor foul!

It will be a enduring treaty creating more shackles and chains and loss of all seats at the top table. That is a result far far worse than simply remaining in the EU.

If polls were in any way accurate I would welcome an explanation as to why both parties received such a massive drubbing in the recent council elections. It simply does not compute!