There's never been a Labour/SNP coalition, so I don't think they'd be likely to think anything ending in "this time".English voters will take one look at a possible Labour SNP coalition and quite rightly ask how much is this going to cost us this time. It's utterly toxic to English voters and having the poisonous Nicola Sturgeon as their leader doesn't help
I can't see any evidence at all that the SNP are problematic for English voters. Any concerns about Ed Milliband's coalition of chaos they had in 2015 will perhaps have been tempered by the realisation that in avoiding it we ended up with 5 years of hellish turmoil, bad government and bad opposition and 2 general elections.
Meanwhile I don't see any evidence that Scottish independence is particularly unpopular with English voters, and indeed many of them will have noticed that Brexit has resulted in the entire UK economy taking as bad a hit as Scotland would have suffered from independence. Most of England suffers far more inconvenience from the harder border with the EU than they ever would from barbed wire at the Berwick border anyway.