YouGov poll on labour voters would suggest caution on Mr Corbyn's part.
I voted remain mainly because I could not see how UK could dis-engage from local markets and just-in-time processes without significant turbulence. Corbyn gave EU 6.5/10 marks, I personally would score around 5.5/10 or 6/10 mainly because of the treatment of Greece.
Basically, like on Slackware when you misconfigure something, 'stormy weather ahead'