"They corrected themselves and the Telegraph is not to blame..."
As I said in my first post in this thread.
For myself I want to see the original research article, when it's available and shorn of reporting biases (so that I only have my own to deal with). Given the question you asked, Khandro -- "Are Remainers reconsidering?" -- I'd also want to see answer to the same questions from a year ago, or six months ago, or ideally several such surveys from the past. You can't claim changing attitudes if you don't know what they were before, after all.
Polls that *have* been running since the EU referendum generally indicate, in fact, that nothing has changed much. There's still pretty much a 50/50 split on how people would vote in a referendum on the same issue; there's still no signs that one side or the over regrets their vote -- at least, neither side more so than the other; and there are still no signs that the country knows whether to be optimistic or not. You can see a few such graphs here:
http://whatukthinks.org/eu/opinion-polls/uk-poll-results/
Almost all of them indicate little or no movement since June 2016. So are remainers reconsidering? Some are, perhaps: but hardly enough to be really significant. This poll doesn't seem to alter that picture either. There are a few fluctuations but on the face of it, Leave and Remain voters are largely indifferent to the specific details of Brexit. Except on immigration.