The GOP is in a completely different position. It has turned into a lily white religious party in a country that is becoming less white and more secular with each passing day. Labour doesn't have to worry about anything. Corbyn will get shlonged in the next election, he'll resign and in 2025 they will once again be in government.
They still need to get constituencies in southern towns and cities that won't fall on their lap the way they did for Blair in '97. Effectively losing the safe Scotland seats to the SNP is a major blow.