That being said, once the campaign gets going, there's no certainty that result will end up being anything like the polls do now.
Because of
1. The sudden nature of the election call
2. The leave/remain polarisation of the country
3. The main opposition leader has been given no chance of victory
There could be some large shifts in party support as voters try to find their most effective choice.
However I think all the action in shifting support will be on the left side. Any Tory losses from remain voters can be made up from UKIP voters or Labour leave voters.
Interested to hear from posters closer to the action.